Given triangle ABC, which equation could be used to find the measure of ∠B? cos m∠B = 2 square root of 5 all over 5
sin m∠B = square root 5
cos m∠B = square root of 5 over 2
sin m∠B = 2 square root of 5 all over 5

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c