Question

1. which triangle has two equal sides and two equal angles?

a. scalene
b. isosceles
c. right
d. equilateral

Explanation:

• A scalene triangle has no equal sides or angles.
• An isosceles triangle has two equal sides (called legs) and the angles opposite those sides (base angles) are equal.
• A right triangle has one \(90^{\circ}\) angle. It can be scalene or isosceles (if the two non - right angles are equal and the two non - hypotenuse sides are equal). But the key property here is about two equal sides and two equal angles which is more directly defined by the isosceles triangle.
• An equilateral triangle has three equal sides and three equal \(60^{\circ}\) angles.

Answer:

B. Isosceles