Question

Four of the angles of a pentagon measure 85°, 110°, 135°, and 95°. Find the measure of the missing angle.
115°
95°
135°
85°

Answer 1

The sum of internal angles in a pentagon is 540.

Answer 2

whats that supose to mean?

Answer 3

You can find the missing angle by summing four angles and finding what the fifth angle must be to get to 540.

Answer 4

i dont get it

Answer 5

How many sides are there in a pentagon ?

Answer 6

5

Answer 7

@freebands12 ?

Answer 8

i think 5

Answer 9

Yeah so,

Sum of interior angles=(n-2)*180

Here n=5

Sum of interior angles=(5-2)*180

Now calculate

Answer 10

how do i do that?

Answer 11

(5-2)*180

Use a calculator.

Answer 12

ok

Answer 13

540

Answer 14

So,

Sum of interior angles=540

Let the unknown angle be "x"

so,

85°110°+135°+95+x=540

Now solve for x :)

Answer 15

what are those little things beside the numbers?

Answer 16

That is the degree sign.

Answer 17

So,what did you get x as ?

Answer 18

i didnt get nothing for x i couldnt find anything for x

Answer 19

85°+110°+135°+95+x=540


Did you solve for x ?

Answer 20

@freebands12 Use a calculator ?

Answer 21

what do i have to do to find x?

Answer 22

add 85+110+135+95 first.

Answer 23

ok

Answer 24

425

Answer 25

425+x=540

Now subtract both sides by 425

Answer 26

115

Answer 27

thanks

Answer 28

Welcome :)