Question

Help please will medal

Answer 1

go for it

Answer 2

Almost the same way we solved that other one. The angle <ABC is one-half of the sum of the two arcs.

Answer 3

Simply add 130 and 40 then divide by 2.

Answer 4

So 170 /2

Answer 5

85?

Answer 6

Right

Answer 7

Yes. Do you need more help understanding that formula? You seemed to get it last time, and this problem is simpler...

Answer 8

well is this 90?

Answer 9

The answer isn't 90 deg., but you will use 90 deg. to help solve.

Answer 10

180?

Answer 11

90 = (1/2) (arcAC + arcAD)
180 = arcAC + arcAD
180 = arcAC + 42

Keep solving for arcAC

Answer 12

138

Answer 13

There you go. Do you understand the steps? What do you find hardest about these problems?

Answer 14

Well do I just get the sides and equal them to 180?

Answer 15

This is 180?

Answer 16

Kind of the opposite. You get the two _arcs_ (what you call 'sides'). You and them up and divide by two, and you get the angle in the middle.

Answer 17

So for this one would I do 90+90

Answer 18

So, maybe. The middle angel is 90, and you double it.

What do think 90+90 is equal to?