A number is chosen at random from 1 to 50. Find the probability of selecting either a multiple of 4 or a multiple of 5.
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Those two angles are complementary - which means they both give us 90 degrees. We know that all three angles in any triangle must be exactly 180 degrees, so the third angle will be 180 - 90 = 90 degrees. It means that our triangle is a <u>straight triangle</u>. The figure will look more less like in the attachment.
