Question

Tina wants to sew a piece of fabric into a scarf in the shape of an isosceles triangle , as shown in the accompanying diagram

what are the values of x and y ?

1) x=42 and y=96
2) x=90 and y=48
3) x=69 and y= 69
4) x=96 and y=42

Answer 1

remember it equals -180
so 180 - 42 = 138
so now we need 2 number to equal 138...hope i helped :D

Answer 2

96 + 42 = 1138 so i believe this is your answer.

Answer 3

A property of an Isosceles triangle is...



So If one Base Angle is 42, the other will be 42 also.
And:
\[180 - 42 + 42 = 96\]

Hence proven than Angle "y" is 42 for being a Isosceles Base Angle and the Angle "x" is 96.

The Answer is:
4) x=96 and y=42