Answer:
7
Step-by-step explanation:
a=2
b=2
c=1
2ab cos C=a²+b²-c²=2²+2²-1²=4+4-1=7
C
Given
a² + b² - 2abcosC = c² ( subtract c² from both sides )
a² + b² - c² - 2abcosC = 0 ( add 2abcosC to both sides )
a² + b² - c² = 2abcosC
Here a = 2, b = 2, c = 1 , then
2² + 2² - 1² = 2abcosC
4 + 4 - 1 = 2abcosC , then
2abcosC = 7 → C
24/2 = 12
the quotient is 12
the square root of 225 is 15.9
Why dont you help her then
the pot needs now 214 milleters of water
