Question

Exercise 17A
1. The three angles of a triangle measure (2x - 10°), (x + 31°) and (5x + 7°). Find the value of x and her
all the angles of the triangle.​

Answer 1

Answer:

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Answer 2

Answer:

(2x-10)+(x-31)+(5x+7) = 180°

2x-10+x-31+5x+7=180°

2x+x+5x-10-31+7=180°

8x-44=180°

8x=180°+44

8x=324

x=324÷8

x=81/2

so,

(2x-10°)=2×81/2-10

= 71°

(x+31°)=81/2+31°

=143/2

(5x+7°)=5×81/2+7

=391/2