Question

One angle of an isosceles triangle measures 40°. Which other angles could be in that isosceles triangle? Choose all that apply.

20* (* is a degree sign sorry can't do one on computer)

40*

100*

70*

Answer 1

70°

(the sum of the angles of a triangle is 180°

180 - 40 = 140.

140/2 = 70

The other 2 angles are 70°

70° + 70° + 40° = 180°).

Answer 2

The angle 100 degrees angles could be in that isosceles triangle

What is the isosceles triangle?

An isosceles triangle is a type of triangle that has any two sides equal in length.

The two angles of an isosceles triangle, opposite to equal sides are equal in measure.

One angle of an isosceles triangle measures 40°.

Let x be the other angles could be in that isosceles triangle.

Using angle sum property of triangle we can write it as:

x + 40 + 40 = 180

x + 80 = 180

By transposing we get,

x = 180 - 80

x = 100

Hence, the angle 100 degrees angles could be in that isosceles triangle.

Learn more about isosceles triangle here;

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