12-13. A boy plays sticks on the playground. He lays them down to form a triangle. The sizes of the sticks are 13 cm, 17 cm, and 23 cm long. What is the measure of the angle included by the sides whose lengths are 17 cm and 23 cm?(round off to the nearest degree) Show your solution.
C. 34° A. 27° B. 35° D. 56°

14-15. What is the area of the triangle formed from the sticks if the angle between 17cm and 22cm is 43°? Show your solution.
A. 110.87cm² B. 127.53cm²
C. 132.87cm². D. 147.87cm²​