????

Area of a right triangle?

• A=1/2ab

• A=absina

The sum of adjacent angles equal...

• 360

• 180

• 90

• 270

The form of middle line of trapezoid?

The measure of reflexive angle?

• 90-180

• 0-90

• 180-360

• 180-270

the sum angles of pentagons?

• 540

• 600

• 360

• 480

A(3;-2) , B (-1; 6)

AB-?

• 8

• 10

• 7

• -5

The form circumference of circle?

<MOB and <MOA-?

• 50

  70

• 120

  60

• 180

  40

• 60

  60

How many kinds of angle?

• 6

• 5

• 4

• 3

The property of parallel lines

• doesn't intersect

• must be intersect

• the side of quadraliteral

• the side of triangle