Question

abcd is a parallelogram.if angle a =80 , then find the measures of the remaining angles​

Answer 1

Answer:

the remaining angles ∠b,∠c,and ∠d are 100°,80°and 100° respectively

Step-by-step explanation:

in parallelogram abcd

∠a=80°                                            

∵ (opposite angles of parallelogram are congruent)

∴∠a=∠c

∴∠c=80°

∠a+∠b=180°              (adjacent angles of parallelogram are supplementary)

80°+∠b=180°

∠b=100°

∵opposite angles of parallelogram are congruent

∴∠d=∠b

∴∠d=100°