Question

Define (any two)
Semi-Circle
Equilateral Triangle
Complementary angles

Answer 1

Answer:

In geometry, an equilateral triangle is a triangle in which all three sides have the same length. In the familiar Euclidean geometry, an equilateral triangle is also equiangular; that is, all three internal angles are also congruent to each other and are each 60°.

either of the two angles which together make 90