Tolong jawab,,....ya

1. C
2. √(21² + 10²) = √541 = 23,2 cm = 23 cm
3. √(13² - 10²) = √69
4. A
5. Sisi tegak = √(17² - 15²) = √64 = 8 cm
Luas = 1/ 2 x 8 x 15 = 4 x 15 = 60 cm²