Question

answer these questions ​

Answer 1

Answer:

45

80.........

.

........

Answer 2

18. An angle is equal to one third of its supplement.

Supplementary angles -: When two angles are equal to 180 degrees they are known to be supplementary angles.

Let the angle be y

Supplement of y = 180°-y

$y = \frac{1}{3} (180-y)$

$3y = 180-y$

$4y = 180$

$y = \frac{180}{4}$

$y = 45$

∴ The measure is equal to b) 45°

19.  An angle is equal to eight times its complement.

Complementary Angles -: When two angles are equal to 90 degrees they are known as complementary angles.

Let the angle be x.

Complement of x = 90° - x

$x = 8*(90-x)$

$x = 720 - 8x$

$9x = 720$

$x = \frac{720}{9}$

$x = 80$

∴The measure is equal to b) 80°.