Answer:
m∠K= 40
HI= 3
Explanation:
For the first triangle, this is an isosceles triangle. So, that means that the bottom angles are equal to each other. And remember that a triangle sums up to 180 degrees. So, the equation would be: 70+70+m∠K= 180.
Step 1- Add to simplify.
(70+70)+m∠K= 180
140+m∠K= 180
Step 2- Subtract 140 to both sides.
140+m∠K= 180
-140 -140
m∠K= 40
For the second triangle, this is an equilateral triangle. This means that all sides are the same and all angles are the same. As you can see, the signs(loops) on the angle measurements are the same, so the sides are the same as well.
That means line HI is 3.
Hope this helps! :)