Answer:
__2_sides of equal length
__2_acute angels
__0_right angle(s)
_1__obtuse angle
The triangle is _isosceles____and_obtuse____.
Step-by-step explanation:
if this is the right triangle the longest side will be √162≈ 12.7
the longest side is 15 so the vertex angle is obtuse
Answer:
angle b = 25°
for angle A = 180 - 50 (ie 25 + 25)
angle a =130°
Answer:
Step-by-step explanation:

Comparing this to the form a+b√5, we see that ...
a = 3/2
b = -1/2
Answer:
Step-by-step explanation:
We have been given that Niu has decorated x cards. He started with 24 stickers and he used 4 stickers per card. So stickers used in x cards will be 4x.
As initial number of stickers was 24, so we can find number of stickers left after decorating x cards by subtracting number of stickers used in x cards from 24.

Therefore, the expression
will represent the number of stickers that Niu has left after decorating x cards.
The area of a rectangle is Base x height whereas the area of a triangle is Base x height divided by 2