Question

SOMEONE ANYONE PLEASE...SMART ANSWER?​

Answer 1

Answer:

angle D = 80

Step-by-step explanation:

We know both triangles are congruent by SAS.

2 sides are congruent (given)  and an angle in between is congruent (vertical angles) Angle A+C=100.         Angle B = 180 -100 =80

The measure of  angle D the same as angle B by CPCTC (congruent parts of congruent triangles are congruent) so also 80

Answer 2

A triangle needs a total of 180° to be a complete triangle. First let's solve for m∠B since we have the other angles given in that triangle.

30 + 70 = 100

180 - 100 = 80° still needed to form a complete triangle. This is what m∠B equals.

From the image provided, we can see that both triangles are the exact same. So all we need to do now is find the angle that matches m∠B. In this case that angle is m∠D. Knowing that m∠B = 80° the final answer is:

m∠D = 80°

Hoped This Helped! Good Luck!