Answer:
The sum of the three angles of any triangle will always be 180 degrees because when all three angles are put together, they form a straight line.
Step-by-step explanation:
I did it on Edgenuity
Answer:
<h2> 18.3</h2>
Step-by-step explanation:
from cosines theorem:
t² = 11² + 14² - 2•11•14•cos87°
t² = 121 + 196 + 308•0.05236
t² = 333.12688
t = √333.12688
t = 18.2517... ≈ 18.3
Answer:
a
Step-by-step explanation:
brainliest pls
Answer:
y=15
x =40
Step-by-step explanation:
3x + 4y=180
and
(x+y+5)=4y
x+y+5=4y
x+5=4y-y
x+5=3y
<u>x=3y-5</u>
<u></u>
3x + 4y=180
3(3y-5) + 4y=180
9y-15 + 4y=180
9y+ 4y -15 =180
13y -15 =180
13y =180+15
13y =195
y =195÷13
y=15
3x + 4y=180
3x + 4(15)=180
3x + 60=180
3x =180 - 60
3x =120
x =120÷3
x =40
