Question

Q.no.1 and Q.no.2 ​

Answer 1

Step-by-step explanation:

given : abcd is a //gram, <B = 130°

solution:- <B+<D= 180° ( sum of opposite angle of a //gram is 180°)

<D=180-130= 50°

<D + <A= 180° (sum of the adjacent angle of a //gram is 180°)

<A=180°-50°=130°

similarly <C= 50°

hope this help.

second answer.

given = //gram abcd and bd is the diagonal

proof:- in ∆ abd and ∆ bcd, we have

ad=bc (opposite side of //gram are equal)

ab=cd (opposite side of //gram are equal)

bd=bd (common)

thus, ∆ abd is congruent to ∆bcd by SSS congruency theorem.

hope this help