Understanding quadrilaterals

what are the types of polygons?

• convex and concave

• convex and concive

• concave and donkey

• concave and xevnoc

What is the number of sides of a regular polygon whose each exterior angle is 45?

• 7

• 8

• 9

• 5

What is the formula for finding angle sum of a polygon if n is the number of sides ?

• (n-2)x181

• (n-2)x180

• (n-1)x180

• (n-2)x360

Find the measure of 'x' in the given figure

• 140

• 240

• 150

• None of these

Find the missing angle.

• 75
• 85
• 100
• 45

Find the missing angle.

• 65
• 85
• 75
• 70

What is the sum of all the angles of a pentagon?

• (a) 180°

• (b) 360°

• (c) 540°

• (d) 720°

If a convex polygon has n sides, the no. of diagonals is given by ?

• n(n-1)/2

• n(n-2)/2

• n(n+3)/2

• n(n-3)/2

If two adjacent angles of a parallelogram are (5x – 5) and (10x + 35), then the ratio of these angles is

• (a) 1 : 3

• (b) 2 : 3

• (c) 1 : 4

• (d) 1 : 2

Find the value of X.

• 100
• 120
• 125
• 130