Answer:
#1: 5
#2:
Step-by-step explanation:
Inverse of Pythagorean Theorem: c²-b²=a²
c² b² a²
13²- 12² = 25
= 5
Pythagorean Theorem: a²+b²=c²
a² b² c²
2² + 6² = 40
c =
9+x
divided by
2
-
35
x=61
360
21×20÷14
=3×20÷2
=3×10
x=30