{{ dragState.item.val }}°
Slide to 90°

Complementary angles add up to 90°.

{{ s1_base }}° {{ s1_val }}°
Drag to match

Supplementary angles form a straight line and add up to 180°.

{{ s2_base }}° {{ 180 - s2_base }}°
{{ opt.val }}°
Match Perfect!
Tap vertical pairs

Vertical angles are opposite each other and are always equal. Find a matching pair!

{{ wedge.val }}°
Vertical angles are equal!
Adjust to balance

These angles are supplementary. Adjust until they form a perfect straight line (180°).

x 2x + {{ s4_c }}
Angle 1:
Angle 2:
Sum:
🏆

Geometry Master!

You've mastered Complementary, Supplementary, and Vertical Angles!