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tafara27
A right triangle contains an angle of measure 45°. Which term describes the triangle?
|dw:1344500880712:dw| What is angle sum of triangle?
From this you can figure out what the remaining angle is, and then from the angles you will know what type of triangle it is.
Here simply one angle is 90. So what we call the triangle with one angle equals 90 ???
the angle sum of a triangle is 180° so \[90°+45°+x°=180°\] \[x°=180°-90°-45°\]