Question

I need a step by step explanation easy enough for a visual learner to understand ‍♀️how?

Answer 1

Step-by-step explanation:

+ sum of 3 angles in a triangle is 180

+ isosceles triangle then 2 bases are congruent

+ 2 opposite angles are congruent

+ 70+70+?=180 ==> ?=40

+ 40+40+x=180 ==> x=100

Answer 2

all of these triangles are isosceles triangles

the legs of the triangle closest to the number " 70⁰ " are both 70⁰ due to being vertically opposite angles

Then,

180⁰ – 70⁰ – 70⁰ = 40⁰

then both legs of the next isosceles triangle and the head of the first isosceles triangle are all 40⁰ due to being vertically opposite angles

Then,

180⁰ – 40⁰ – 40⁰ = 100⁰

therefore, since

x = to the head of the second triangle

because they are vertically opposite angles

then,

x = 100⁰