Question

a triangle that has two equal angles and two equal sides is a(n) ______
a. scalene triangle
b. isosceles triangle
c. equilateral triangle
d. right triangle

Explanation:

To solve this, we recall the definitions of triangle types:

• A scalene triangle has all sides and angles unequal.
• An isosceles triangle has at least two equal sides and two equal angles.
• An equilateral triangle has all three sides and angles equal.
• A right triangle has one right angle (90°), not defined by equal sides/angles (unless it's an isosceles right triangle, but the key here is the general definition matching two equal sides and angles).

The question describes a triangle with two equal angles and two equal sides, which matches the definition of an isosceles triangle.

Answer:

B. isosceles triangle