Question

1. if two sides of a triangle are 7 cm and the base angle is 50 degrees, what type of triangle is it?

right
isosceles
scalene
equilateral

Explanation:

An isosceles triangle has at least two equal sides and the base angles opposite those equal sides are equal. Here, two sides are 7 cm (equal), so it meets the criteria of an isosceles triangle. A right triangle has a 90° angle (not indicated here), a scalene triangle has all sides unequal (but we have two equal sides), and an equilateral triangle has all sides equal (we only know two sides are equal, not necessarily all three).

Answer:

B. Isosceles