Question

帮帮忙，谢谢！

Answer 1

有勾股定理知，a:b:c=3:4:5 又c=15 所以a=9 b=12

追答

30°所对的直角边等于斜边的一半，所以c=4又有勾股定理知b=2√3

记得好评哦

Answer 2

(1).a=9,b=12 (2).c=4,b=2根号3

Answer 3

a 9 b 12

Answer 4

 晌迅含宴笑昌粗

Answer 5

 嫌此中芹山扒仿