Since the triangle is equilateral (you can tell by the tick on each side), all angles have the same measure as well.
The angles of a triangle sum up to 180 degress, so three equal angles must measure 60 degrees each.
So, in particular, we have
7x + 4 = 60 7x = 56 x = 8
Answer:
Step-by-step explanation:
Semicircle:
diameter = length of the rectangle = 25 cm
Half circumference = πd/2
= 3.14 * 25/2 = 39.25 cm
Perimeter of the figure = 39.25 + 20 + 25 + 20
= 104.25 cm
I know that one is obtuse and acute
Let x represent the number of spaniels
4x + x = 30
combine like terms
5x = 30
divide each side by 5
x = 6
There are 6 spaniels.
