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Mathematics 5 Online
OpenStudy (samirahdanyel):

Triangle JKL is isosceles. The measure of angle J is 72° and the measure of angle K is 36°. Which statement describes angle L? Angle L is a base angle and measures 36°. Angle L is a base angle and measures 72°. Angle L is a vertex angle and measures 36°. Angle L is a vertex angle and measures 72°.

OpenStudy (samirahdanyel):

I know its 72

OpenStudy (wolf1728):

A triangle has 180 degrees so angle L should measure 180 -72 -36 ?? Also in an isosceles triangle, the base angles are equal.

OpenStudy (wolf1728):

The three angles are 72 72 and 36 What are the base angles?

OpenStudy (samirahdanyel):

okay cool i understand

OpenStudy (wolf1728):

okay then

OpenStudy (samirahdanyel):

wait sorry

OpenStudy (samirahdanyel):

the base angle isnt 72

OpenStudy (welshfella):

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OpenStudy (welshfella):

the base angles are marked and are equal

OpenStudy (samirahdanyel):

so i was right . it is 72

OpenStudy (welshfella):

the 3 angles are either 36,36 and 72 or 36,72, and 72. Since the 3 angles must add up to 180 degrees only one of these is possible.

OpenStudy (welshfella):

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