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miathegeek97
27.06.2019 •
Mathematics
Ineed asap like no /> the formula for the circumference of a circle is = 2. use 3.14 for . solve the formula for r. what is the radius of a circle with a circumference of 87 ? round to the nearest tenth. a. = 2; 13.9 cm b. =2 π ; 27.7 cm c. = 2 ; 546.4 cm d. = − 2 ; 80.7 cm the formula for the area of a triangle is = ℎ /2 solve the formula for h. what is the height of a triangle that has an area of 25 2 and a base with a length of 10 ? a. ℎ = 2 ; 1.25 mi b. ℎ = 2 ; 2.5 mi c. ℎ =2/; 0.2 mi d. ℎ = 2/; 5 mi
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Ответ:
C / (2pi) = r; r= 13.9 cm
2A/b = h ; h= 5
Step-by-step explanation:
The formula for the circumference of a circle is C = 2* pi * r.
Solving for r, we need to divide by 2 * pi on each side
C/(2* pi) = 2*pi*r/ (2* pi)
C / (2pi) = r
If the circumference is 87, we can find r by substituting into the equation.
87 / (2 * 3.14) = r
87/ 6.28 = r
13.85350318=r
Rounding to the nearest tenth
r= 13.9 cm
The formula for the area of a triangle is A = bℎ /2
To solve the formula for h, we need to multiply each side by 2
2*A = bh
Then divide each side by b
2A/b = bh/b
2A/b = h
If the area of a triangle is 25 and the base of 10 , we can substitute in to find the height.
2* 25 /10 = h
50/10 = h
5 =h
Ответ:
Th answer is 9 or option 'C'
Step-by-step explanation: I took the qwiz an K-12
and my answers are ALWAYS right.