Which statement is not true? a. all isosceles triangles are also equilateral triangles. b. all equilateral triangles are also isosceles triangles. c. obtuse triangles have one interior angle whose measure is more than 90°. d. acute triangles have no angles whose measures are greater than 90°.

Solve these problems: 1.what is the perimeter of an equilateral triangle with sides measuring 6cm? 2. a regular pentagon has sides measuring 3.2 cm. what is its perimeter? 3. a regular decagon has sides of 3.5mm . what is it’s perimeter? 4. a regular octagon has a perimeter of 64cm. what is the length of one of the sides? 5. a regular hexagon has a perimeter of 72mm . what is the length of one of the sides? 6. what is the perimeter of a rhombus with sides measuring 11m?