Erik leans a 15 foot ladder up against his house in order to clean the gutters. The base of the ladder is 9 feet from the base of the house. How far up the house does
the ladder reach?

If 20% of a number is 35, what is 50% of that number?

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.

Find the measure of angle b in the following triangle