Answer:
75.775
Step-by-step explanation:
the sum of all angles in a triangle is ALWAYS 180°.
and by using the word "congruent" : for angles that only means they are equally large so,
180 = P + Q + R = 2×P + 28.45
(because P = Q)
2×P = 151.55
P = Q = 151.55 / 2 = 75.775°
and by using the word "congruent" : for angles that only means they are equally large.
we know the third angle.
so,
it is true.
the proportions 4:6 and 10:15 can both be simplified into 2/3.
hope this helped! :)
