Question

6. Two complementary angles differ by 10°. Find the angles.
[Hint: Sum of two complementary angles is 90°)
7. In a quadrilateral ABCD, (A-60°, (B - 80° and (C is thrice of (D. Find the (C and (D
(Hint: Sum of angles of a quadrilateral is 360°)
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Answer 1

Answer:

6. 50 and 40

7. 55 and 165

Step-by-step explanation:

6. x+y=90

x-y = 10

adding both equations, 2x = 100

so, x=50.

substituting x= 50 in x+y=90, y=40

7. Given: C = 3D

a+b+c+d= 360

60 + 80 + d + 3d = 360

4d= 220

d = 55

Therefore, c= 165