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How many different isosceles triangles have at least one angle that measures exactly 20?
If one angle measures 20 degrees then the other two angles must each measure 80 degrees and many other similar or congruent isosceles triangles can have the same interior angles.
If two angles are supplementary and one angle measures 130 degrees what is the measure of the other angle?
Supplementary angles add up to 180 degrees. If one angle = 130 degrees the other must be 180 - 130 = 50 degrees
How do you calculate perimeter of irregular figures?
The exact method varies according to the figure. You must somehow calculateor measure the length of each segment of the outline, and then sum them.
What must be true if a segment intersects another segment at more than one point?
That means that it is not a line segment.
Two angles are supplementary and one measures 60 less than the other Find the measure of the larger angle?
Two supplementary angles add up to 180 degrees. If one measures 60 less than the other, they must be 60 and 120 degrees, so the measure of the larger angle is 120 degrees. To find that algebraically, where m is the larger angle: m+(m-60)=180 2m=240 m=120
