Question

The diagram shows triangle ABC. Work out the value of x.

please solve
20 degrees
16 degrees
15 degrees

Answer 1

by angle sum property

90 + 2x + 3x +10 = 180 °

5x = 180 - 100

5x = 80

x = 80/5

x = 16 °

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Answer 2

Step-by-step explanation:

"SUM OF ANGLES OF A TRIANGLE = 180°"

90°+2x+3x+10° = 180°

100°+5x = 180°

5x = 180°-100° = 80°

x = 80/5 = 16

VERIFICATION

1st angle = 2x = 2×16 = 32°

2nd angle = 3x+10° = 3×16°+10 = 58°

3rd angle = 90°

32°+58°+90° = 180°

180° = 180°

HENCE VERIFIED