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Isosceles and equilateral triangle theorems — Homework
Use the Base Angles Theorem, its converse, and the equilateral-triangle corollary as needed.
- 1.Triangle JKL is isosceles with JK ~= JL. angle K = 48 degrees. Find angle L.
- 2.Using the same triangle, find angle J.
- 3.An equilateral triangle has an angle labeled 3x + 30 degrees. Find x.
- 4.Triangle MNO has angle M ~= angle N. Side OM = 9. Which other side must also equal 9, and which theorem justifies it?
- 5.A triangle has sides of length 7, 7, and 4. Without measuring any angles, what can you say about two of its angles, and why?
🌲 Homeschool of the FutureTenth Grade · Math · week 16 homework