Question

Find x and classify each triangle by its angles. Provide the theorem (sum of interior angles or exterior angle theorem) you used to solve the problem.

Answer 1

the sum of the interior angles of a triangle = 180

Answer 2

wut o.o

Answer 3

u have 3 angles in the triangle
if all 3 are equal, it wud be equilateral
if none of them are equal, it wud be scalene

Answer 4

first find x, then we can classify wat type triangle it is

Answer 5

don't you add the other two angles then subtract from 180 to find the missing angle?

Answer 6

exactly ! do that

Answer 7

and see wat u get for x

Answer 8

ok i got 80

Answer 9

good :)

Answer 10

wait a sec, the question is about classifying the triangle based on angles

Answer 11

yes

Answer 12

since, all angles are less than 90
it wud be an 'acute triangle'

Answer 13

ok

Answer 14

thats it, we're done.

Answer 15

its an acute triangle, and the theorem we've used is : sum of interior angles

Answer 16

but we have to put what theorem we used

Answer 17

what does that mean?

Answer 18

whatever u did :)
"don't you add the other two angles then subtract from 180 to find the missing angle?
"

Answer 19

oh wait i see you said i already

Answer 20

it*

Answer 21

sum of interior angles = 180
x+60+40 = 180
x = 180 - (60+40)

Answer 22

good :D