.theorem-icon{
    width: 45px;
    height: 45px;
    background-size: contain;
    display:inline-block;
}
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.CHORD_MIDPOINT_FROM_LINE_THROUGH_CENTER{background: url('sprite_theorems.svg#svgView(viewBox(45,0,45,45))') no-repeat;}
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.CONGRUENT_ANG_FROM_ALTERNATE_INTERIOR{background: url('sprite_theorems.svg#svgView(viewBox(135,0,45,45))') no-repeat;}
.CONGRUENT_ANG_FROM_CONGRUENT_SIDES{background: url('sprite_theorems.svg#svgView(viewBox(180,0,45,45))') no-repeat;}
.CONGRUENT_ANG_FROM_CORRESPONDING{background: url('sprite_theorems.svg#svgView(viewBox(225,0,45,45))') no-repeat;}
.CONGRUENT_ANG_FROM_ISOSCELES_TRAPEZOID{background: url('sprite_theorems.svg#svgView(viewBox(270,0,45,45))') no-repeat;}
.CONGRUENT_ANGLES_FROM_PARALLELOGRAM{background: url('sprite_theorems.svg#svgView(viewBox(315,0,45,45))') no-repeat;}
.CONGRUENT_ANG_FROM_VERTICAL{background: url('sprite_theorems.svg#svgView(viewBox(360,0,45,45))') no-repeat;}
.CONGRUENT_CHORDS_FROM_EQUAL_DIST ANCES{background: url('sprite_theorems.svg#svgView(viewBox(405,0,45,45))') no-repeat;}
.CONGRUENT_COMPLEMENTARY{background: url('sprite_theorems.svg#svgView(viewBox(450,0,45,45))') no-repeat;}
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.CONGRUENT_RIGHT_TRI_FROM_HL{background: url('sprite_theorems.svg#svgView(viewBox(90,45,45,45))') no-repeat;}
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.CONGRUENT_TRI_FROM_SSS{background: url('sprite_theorems.svg#svgView(viewBox(450,45,45,45))') no-repeat;}
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.CONGURENT_SEG_FROM_CPCTC{background: url('sprite_theorems.svg#svgView(viewBox(540,45,45,45))') no-repeat;}
.EQUAL_DISTANCES_FROM_CONGRUENT_CHORDS{background: url('sprite_theorems.svg#svgView(viewBox(0,90,45,45))') no-repeat;}
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.MULTIPLE_SEG_FROM_SIMILAR_TRI{background: url('sprite_theorems.svg#svgView(viewBox(45,90,45,45))') no-repeat;}
.ISOSCELES_TRAPEZOID_FROM_CONGRUENT_ANG{background: url('sprite_theorems.svg#svgView(viewBox(90,90,45,45))') no-repeat;}
.MIDSEGMENT_IS_HALF_BASE_INTRI{background: url('sprite_theorems.svg#svgView(viewBox(135,90,45,45))') no-repeat;}
.MIDSEGMENT_IS_PARALLEL_TOBASE_INTRI{background: url('sprite_theorems.svg#svgView(viewBox(180,90,45,45))') no-repeat;}
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.PARALLELOGRAM_FROM_CONGRUENT_ANGS{background: url('sprite_theorems.svg#svgView(viewBox(270,90,45,45))') no-repeat;}
.PARALLELOGRAM_FROM_CONGRUENT_SIDES{background: url('sprite_theorems.svg#svgView(viewBox(315,90,45,45))') no-repeat;}
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.PROPORTION_SEG_FROM_ALTITUDE_ONH YP{background: url('sprite_theorems.svg#svgView(viewBox(0,135,45,45))') no-repeat;}
.RECTANGLE_FROM_RIGHT_ANG_IN_PARALLELOGRAM{background: url('sprite_theorems.svg#svgView(viewBox(45,135,45,45))') no-repeat;}
.RECTANGLE_FROM_SQUARE{background: url('sprite_theorems.svg#svgView(viewBox(90,135,45,45))') no-repeat;}
.RHOMBUS_FROM_CONSECUTIVE_SIDES{background: url('sprite_theorems.svg#svgView(viewBox(135,135,45,45))') no-repeat;}
.RHOMBUS_FROM_ANGLE_BISECTORS{background: url('sprite_theorems.svg#svgView(viewBox(180,135,45,45))') no-repeat;}
.RHOMBUS_FROM_SQUARE{background: url('sprite_theorems.svg#svgView(viewBox(225,135,45,45))') no-repeat;}
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.RIGHT_ANG_FROM_TANGENT{background: url('sprite_theorems.svg#svgView(viewBox(315,135,45,45))') no-repeat;}
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.SUPPLEMENTARY_FROM_LINEAR_PAIR{background: url('sprite_theorems.svg#svgView(viewBox(0,180,45,45))') no-repeat;}
.SUPPLEMENTARY_ANG_FROM_CYCLIC_QUAD{background: url('sprite_theorems.svg#svgView(viewBox(45,180,45,45))') no-repeat;}
.SUPPLEMENTARY_ANG_FROM_ISOSCELES_TRAPEZOID{background: url('sprite_theorems.svg#svgView(viewBox(90,180,45,45))') no-repeat;}
.SUPPLEMENTARY_ANG_FROM_SAME_SIDE_INTERIOR{background: url('sprite_theorems.svg#svgView(viewBox(135,180,45,45))') no-repeat;}
.SUPPLEMENTARY_ANGLES_FROM_PARALLELOGRAM{background: url('sprite_theorems.svg#svgView(viewBox(180,180,45,45))') no-repeat;}
.SUM_ANG_FROM_TRIANGLE{background: url('sprite_theorems.svg#svgView(viewBox(225,180,45,45))') no-repeat;}
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.CONGRUENT_SEG_FROM_SQUARE{background: url('sprite_theorems.svg#svgView(viewBox(540,180,45,45))') no-repeat;}
.CONGRUENT_ADJACENT_SEGMENTS_FROM_KITE{background: url('sprite_theorems.svg#svgView(viewBox(0,225,45,45))') no-repeat;}
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.CONGURENT_ANG_FROM_BISECTOR{background: url('sprite_theorems.svg#svgView(viewBox(90,225,45,45))') no-repeat;}
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.CONGRUENT_SEG_FROM_ITSELF{background: url('sprite_theorems.svg#svgView(viewBox(450,315,45,45))') no-repeat;}
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.PARALLEL_SEG_FROM_ALTERNATE_EXTERIOR{background: url('sprite_theorems.svg#svgView(viewBox(540,315,45,45))') no-repeat;}
.PARALLEL_SEG_FROM_ALTERNATE_INTERIOR{background: url('sprite_theorems.svg#svgView(viewBox(0,360,45,45))') no-repeat;}
.PERPENDICULAR_CHORDS_FROM_DIAMETER{background: url('sprite_theorems.svg#svgView(viewBox(45,360,45,45))') no-repeat;}
.PERPENDICULAR_FROM_RHOMBUS{background: url('sprite_theorems.svg#svgView(viewBox(90,360,45,45))') no-repeat;}
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.CONGRUENT_SUPPLEMENTARY{background: url('sprite_theorems.svg#svgView(viewBox(270,360,45,45))') no-repeat;}
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.CONGRUENT_SEG_FROM_RADIUS{background: url('sprite_theorems.svg#svgView(viewBox(360,360,45,45))') no-repeat;}
.RIGHT_ANGLE_FROM_RECTANGLE{background: url('sprite_theorems.svg#svgView(viewBox(405,360,45,45))') no-repeat;}
.RHOMBUS_FROM_PARALLELOGRAM_WITH_PERPENDICULAR_DIAGONALS{background: url('sprite_theorems.svg#svgView(viewBox(450,360,45,45))') no-repeat;}
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.EQUAL_SEG_FROM_EQUAL_MEASURES{background: url('sprite_theorems.svg#svgView(viewBox(540,360,45,45))') no-repeat;}
.ANGLE_ADDITION_POSTULATE{background: url('sprite_theorems.svg#svgView(viewBox(0,405,45,45))') no-repeat;}
.SEGMENT_ADDITION_POSTULATE{background: url('sprite_theorems.svg#svgView(viewBox(45,405,45,45))') no-repeat;}
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.SEGMENT_SUBTRACTION_POSTULATE{background: url('sprite_theorems.svg#svgView(viewBox(135,405,45,45))') no-repeat;}
.ANGLE_SUBTRACTION_POSTULATE{background: url('sprite_theorems.svg#svgView(viewBox(180,405,45,45))') no-repeat;}
.SUPPLEMENTARY_FROM_THREE_ANGLES_ON_A_LINE{background: url('sprite_theorems.svg#svgView(viewBox(225,405,45,45))') no-repeat;}
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.PYTHAGORAS{background: url('sprite_theorems.svg#svgView(viewBox(315,405,45,45))') no-repeat;}
.RIGHT_ANGLE_FROM_ALTITUDE{background: url('sprite_theorems.svg#svgView(viewBox(360,405,45,45))') no-repeat;}
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.EQUIVALENT_SEGMENTS_FROM_MEDIAN{background: url('sprite_theorems.svg#svgView(viewBox(450,405,45,45))') no-repeat;}
.BISECTOR_FROM_PERPENDICULAR_MEDI AN{background: url('sprite_theorems.svg#svgView(viewBox(495,405,45,45))') no-repeat;}
.RIGHT_ANGLE_FROM_PERPENDICULAR_BISECTOR{background: url('sprite_theorems.svg#svgView(viewBox(540,405,45,45))') no-repeat;}
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.EQUIVALENT_SEGMENTS_FROM_PERPENDICULAR_BISECTOR{background: url('sprite_theorems.svg#svgView(viewBox(45,450,45,45))') no-repeat;}
.PERPENDICULAR_FROM_PERPENDICULAR_BISECTOR{background: url('sprite_theorems.svg#svgView(viewBox(90,450,45,45))') no-repeat;}
.SEGMENT_RATIO_FROM_MEASUREMENTS{background: url('sprite_theorems.svg#svgView(viewBox(135,450,45,45))') no-repeat;}
.PERPENDICULAR_DIAGONALS_FROM_KITE{background: url('sprite_theorems.svg#svgView(viewBox(180,450,45,45))') no-repeat;}
.PARALLEL_OPPOSITE_SIDES_FROM_ISOS_TRAPEZOID{background: url('sprite_theorems.svg#svgView(viewBox(225,450,45,45))') no-repeat;}
.CONGRUENT_ANGLES_FROM_THIRD_IN_TRIANGLES{background: url('sprite_theorems.svg#svgView(viewBox(270,450,45,45))') no-repeat;}
.TRAPEZOID_FROM_ISOSCELES_TRAPEZOID{background: url('sprite_theorems.svg#svgView(viewBox(315,450,45,45))') no-repeat;}
.CENTER_FROM_END_OF_RADIUS{background: url('sprite_theorems.svg#svgView(viewBox(360,450,45,45))') no-repeat;}
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.SECANT_FROM _POINT_SEGMENT_AND_ CIRCLE{background: url('sprite_theorems.svg#svgView(viewBox(450,450,45,45))') no-repeat;}
.DIAMETER_FROM_POINT_SEGMEN_AND_C IRCLE{background: url('sprite_theorems.svg#svgView(viewBox(495,450,45,45))') no-repeat;}
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