Step-by-step explanation:
Hey there!
Here;
A triangle is given with different measurements.
To find: value of p.
5 p = 2p+21° + 45° {The external angle is equal to the sum of opposite adjacent interior angles}
or, 5p - 2p = 21°+45°
3p = 66°
p = 66°/3
Therefore, the value of "p" is 22°.
Hope it helps....
