Hey there! :)
Triangles measure 180°
1 side = 100°
180 - 100 = 80
The measure of both unknown angles = 80°
Both are congruent, or the same. That means you have to divide by 2.
80 ÷ 2 = 40
? = 40°
Hope this helps :)
<span>Answer:
Use properties of logarithm to expand the logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using calculator.
log4(4/x) = log4(4) - log4(x) = 1 - log4(x)
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Evaluate the expression without using a calculator.
log7 1/root:7
log7(1/sqrt(7))
= log7(1) - log7(sqrt(7))
= 0 -(1/2)log7(7)
= 0-1/2
= -1/2</span>
