The central angle is 2 radians.
Step-by-step explanation:
Arc length of circle = 6.9813
Radius of circle = 4
Central angle = ?
The formula used to find central angle is :
where s= arc length, r = radius and Ф= central angle
We are given:
s= 6.9813 and r = 4 , finding central angle:
Rounding off to nearest whole number:
So, The central angle is 2 radians.
Keywords: Central angle of circle
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Answer:
(a + 2b)(a - b)
Step-by-step explanation:
Assuming you require the expression to be factored
Given
a² +
ab - b² ← factor out
from each term
= (a² + ab - 2b²) ← factor the quadratic
Consider the factors of the coefficient of the b² term(- 2) which sum to give the coefficient of the ab- term (+ 1)
The factors are + 2 and - 1, since
2 × - 1 = - 2 and 2 - 1 = + 1, thus
a² + ab - 2b² = (a + 2b)(a - b) and
a² +
ab - b² =
(a + 2b)(a - b)