Question

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Answer 1

$\bigstar$ Question:

• In the figure, PQR is a line. Find the value of a.

$\bigstar$ Given:

• PQR is a line.

$\bigstar$To find:

• The value of a.

$\bigstar$ Solution:

Here we observe in the figure that the given angles are forming linear pair, and also PQR is a line.

$\therefore$ 3a + 5° + 2a - 25° = 180°

(Linear Pair)

$\implies$ 5a - 20° = 180°

$\implies$ 5a = 180° + 20°

$\implies$ 5a = 200°

$\implies$ a = 200°/5

$\implies$ $\boxed{a = 40°}$

$\therefore$the value of a is 40° and hence the correct option is (a) 40°.

$\bigstar$ Answer:

• So, the correct option is (a) 40°.