Quadrilaterals, Triangles, and the Coordinate Plane

This is . . .

• a scalene triangle

• an acute triangle

• an isosceles triangle

• an obtuse triangle

An EQUILATERAL triangle has ___________.

• 3 equal sides

• 4 equal sides

• no equal sides

• 2 equal sides

An ISOSCELES triangle has _____________.

• 3 equal sides

• 4 equal sides

• no equal sides

• 2 equal sides

Tell whether the triangles are similar. Explain.

• Yes because it looks like it

• Yes because 36 + 72 + 33 = 180

• No because 36 + 72 + 33 =/= 180

• Def not

If 2 of the angles of a triangle are 30 and 70 degrees, the third angle measures...

• 80
• 100
• 60
• 90

When 2 lines intersect, the angles opposite each other are

• complementary
• supplementary
• adjacent
• vertical angles

In an equilateral triangle, all angles are equal.  How many degrees in each?

• 180
• 60
• 50
• 90

The Pythagorean Theorem ONLY works on which triangle? 

• Obtuse

• Right

• Acute

• Isosceles

Do the segment lengths 9, 12, and 15 form a right triangle?

• Yes

• No

What is the side of a right triangle across from the right angle called?

• Square

• Arm

• Leg

• Hypotenuse