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### 6 Cards in this Set

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 SUM OF THE INTERIOR ANGLES the interior triangle add up to 180 degress MEASURE OF THE EXTERIOR ANGLE the measure of theexterio of the a triangle is equal to the sum of the measure of the remote interior angles SUM OF THE EXTERIOR ANGLE THE MEASURE OF THE THREEEXTERIOR ANGLES OF ANY TRIANGLE ADD UP TO 360 THE GENERAL FORMULA OF THE AREA OF A TRIANGLE IS ALWAYS THE SAME. THE 1/2 BASE * HEIGHT THE HEIGHT IS PERPENDICULAR DISTANCE BETWEEN THE SIDE THAT'S CHOSEN AS THE BASE AND OPPOSITE VERTEX ISOSCELES TRIANGLE AN ISOSCELES TRIANGLE THAT HAS TWO EQUAL SIDES . NOT ONLY ARE TWO SIDES EQUAL BUT THE ANGLE OPPOSITETHE EQUAL SIDES, CALLED BASE ANGLES AREALSO EQUAL. EQUALATERAL TRIANGLES IS A TRIANGLETHEAT HAS THREE EQUAL SIDES. SINCE ALL THE SIDES ARE EQUAL, ALL THE ANGLES ARE ALSO EQUAL. ALL THREE ANGLES ALL THREE ANGLES MEASURE 60 DEGREES REGARDLESS