Question

What is the area of ABC below? If necessary, round your answer to two decimal places.

Answer 1

i got the area form each triangle sepreatly then added them up and got 128.77

Answer 2

That should be right. You have two sides, you can calculate the third.

Answer 3

i'll check your answer and see if it's right. Give me a second :)

Answer 4

thank you :)

Answer 5

37.13

Answer 6

@slopez95

Answer 7

you got that for the bigger one? because I got 21.81. hmm how did you get that?

Answer 8

i multiply 7.9 and 23.2 for the big one then divide by 2
same for the small one 9.4x7.9 then divide by 2

Answer 9

hmm that might be why. i used a^2+b^2=c^2 to get the base of both triangles first. to get the area you do bh/2. base is the bottom measurement.

Answer 10

well i have to find the area so i found he area of both then add them together i think thats how?

Answer 11

yes but you're finding the area the wrong way. first you have to find the base. without the base measurement you can't find area. once you do it that way, you can add them

Answer 12

poo so how can i find the base? can you help me plz :)

Answer 13

okayy. a triangle is sides a, b and c. now the slanted side is always c. For the smaller one the sides are b=7.9 and c=9.4. plug it into this and solve. a^2+b^2=c^2 let me know what you get.

Answer 14

so it would be 62.41 and 88.36 then subtract = 25.9 right?

Answer 15

yes! now find the square root since that is squared right now.

Answer 16

5.09?

Answer 17

exactly :) now do the same for the bigger triangle.

Answer 18

i got square root of 21.81?

Answer 19

26.9?

Answer 20

oh wait, no i'm sorry. now with each of the bases you do bh/2 to get the area. my bad. So it'll be 5.09*7.9 and 21.81*7.9

Answer 21

hahaha lol its cool =)

Answer 22

i got 40.211 and 172.299?

Answer 23

yes :) now add lol

Answer 24

212.51?

Answer 25

you got it :)

Answer 26

thank you ur awesome

Answer 27

No problem :) thanks.