Find the measure of ∠c if

∠a = 52x + 30
∠b = 72x + 40
∠c = 92x + 10
∠d = 52x + 20

a)70°
b)80°
c)90°
d)100°

Any 4 sides polygon has total of 360 degree

therefore adding p all angles you got 268x +100= 360

minus 100 on both side 268x= 260

divide 268 on both side you got x around .97

therefore angle C is around 99.25closest answer is D 100

hope this help

answer:

step-by-step explanation:

(a) no, δrst and δxyt are congruent but δrst cannot be mapped to δxyt using a series rigid transformations. (b) no, δrst and δxyt are not congruent. (c) yes, δrst can be reflected across the line containing rt and then rotated about t so that s is mapped to y. there you go. is this ?