Question

20. One of the angles of a triangle is 100* and the other two angles are equal. Find the measure of each of these equal angles.
(a) 45°
(b) 40°
(c) 41°
(d) 42°p

Answer 1

Answer:

40 degree

Step-by-step explanation:

because the sum of angles is 180 degree

100 +80 is 180 degree

80 / 2 is a 40 degree

so the answer is 40 degree

Answer 2

Answer: (b)

Let the angles be A, B and C

Now,

If A = 100° and B = C

A + B + C = 180° (triangle sum property)

100° + 2B = 180°

B = (180° - 100°)÷2

B = 40°

Since,

B = C

Both B and C equal 40° respectively