Almost there, then everything is set! Thanks guys

x = 50°

Step-by-step explanation:

Step 1.

180° - 80° (because there are 180 degrees in a triangle) = 100°

Step 2.

100° ÷ 2 = 50° (because the two angles on the bottom are identical, as this is an isosceles triangle - which we know because the two sides on the left and right are both the same length, 7 units)

Step 3.

x = 50°

a is the right answer

answer: 40392

step-by-step explanation:

10098 x 4 = 40392