Question

Practice Question 7
Using the properties of quadrilaterals, find the unknown angle x
​

Answer 1

Answer:

20°

Step-by-step explanation:

Consider ΔABC;

its an isosceles triangle,hence

<A=<C

<A=70°

By angle sum property:

<A+<B+<C=180°

70°+<B+70°=180°

<B=180°-140°

<B=40°

by ASA properties ΔABE ≅ ΔCBE

therefore,

<B=x+x

40°=2x

x=20°

HOPE THAT HELPS!!

Answer 2

1. angle A= angle C– angle of kite

angle C –70 - given

angle A=70

angle AEB

angle A +E+B=180

the sum of measure are angle of kite

70+90+angleB=180

=160+angle B=180

angle B = 180-160= 20

the answer is. 20

HOPE THIS HELP FUL US