Question

Find ∠C and hence classify each triangle according to:

a. the number of equal sides it has, and

b. the type of angles it has, e.g. equilateral triangle & acute-angled

triangle.

Given Angles ∠C Number of equal

sides


Types of Triangle


∠A = 20

∠B = 60

Answer 1

a) 0

b) scalene and obtuse

Explanation:

∠A = 20

∠B = 60

∠C = 180 - 20 - 60 = 100 (obtuse)

Since none of the angles are equal, no sides are equal either

So, it's a scalene triangle

Since one angle is obtuse, it's an obtuse triangle