Question

please tell the answer of this question​

Answer 1

Answer:

a = 115°

b = 40°

Step-by-step explanation:

Total angle of the pentagon, 540°, unknown angle (U) of the pentagon, 540°-90°-90°-90°-25° = 245°

a = 360°-U so,

a = 360°-245° = 115°

Now, total angle of ∆PQR is 180°

<P = 50° and <R =90°, since TU || SR

So <b = 180°-90°-50° = 40°

Answered by Gauthmath

Answer 2

Answer:

As T U || SR and TR is the transversal

line

ZTRS + ZRTU ⇒ ZTRS = 90° 180°

ZP RS = ZTRS - 90° (*.*

vertically opposite angles)

In APQR,

ZP + ZQ+/R = 180°

50° +b+90° = 180°

b = 40°