Question

in trapezium ABCD ab parallel CD if angle A is equal to 80 degree and Angle b is equal to 75 degree then find angle d with diagram​
YES NOTalpha bhi hai ^_^​

Answer 1

Answer:

Given that ABCD is a trapezium,

AB∥CD and AD=BC

To prove: (i) ∠A=∠B

(ii) ∠C=∠D

(iii) △ABC≅△BAD

(iv) AC=BD

Construction: Draw CE∥AD and extend AB to intersect CE at E.

Poof:

(i) As AECD is a parallelogram.

By construction, CE is parallel to AD and AE is parallel to CD,

∴AD=EC