Question

HELP I WILL FAN AND MEDAL


The measures of two angles of a triangle are 36° and 71°. Find the measure of the third angle, and classify the triangle according to its angles.

A. 199°, acute

B. 199°, right

C. 73°, acute

D. 73°, right

Answer 1

well we know that a triangle has 180 degrees right?

Answer 2

hint : you dont need to do any calculations for this problem

Answer 3

use this :
sum of angles in a triangle is 180

Answer 4

\(\large\color{blue}{ \rm 180-(71+36)=?}\)

Answer 5

so what we do to find out is the total sum of the two degrees and determine if it shoter than 90 = acute, larger than 90 = obtuse, and is 90 = right triangle

Answer 6

just for description...this is ridiculously easy ...sum of angles should be 180..sum of these two becomes 36+71=107...okay...now do 180-107

Answer 7

In light of that information, which two options you can strike off ?

Answer 8

OK

Answer 9

you can easily write off three wrong answers...

Answer 10

add \[36 + 71\]

Answer 11

then subtract 180 and then determine if it shoter than 90 = acute, larger than 90 = obtuse, and is 90 = right triangle

Answer 12

that equal 73

Answer 13

@SolomonZelman

Answer 14

so obviously it is not A or B

Answer 15

B and D gone as for a right triangle 90 degree is a must...A gone because in a triangle you cant have 199 degree

Answer 16

107 @Muzzack

Answer 17

this is C

Answer 18

yes now 180 - 107

Answer 19

so C

Answer 20

i think C

Answer 21

so im right