An elevator was stopped at the 18th floor. Penny got in and went 14 floors down and got off. What floor did she get off at?
1 answer:
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we can see that angle is an inscribed angle of arc 99 degrees. We know that measure of an inscribed angle is half the measure of inscribed arc.
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We know that measure of all angles of a triangle is 180 degrees. The measure of 3rd angle will be half the measure of c, so we can set an equation as:
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