Answer:
12
Step-by-step explanation:
2+4=6
8-2=6
6+6=12
Answer:
0
Step-by-step explanation:
The determinant of this matrix is zero (0).
The three little lines through the sides of the triangle mean all three sides are equal. Because all three sides are equal the three inside angles would aso be equal.
The three angles of a triangle need to equal 180, so we can divide 180 by 3 to find what each angle is:
180 / 3 = 60.
Now we can set the equation with x in it to equal 60:
7x +4 = 60
Subtract 4 from each side:
7x = 56
Divide each side by 7:
x = 56 / 7
x = 8
Answer:
The surface area is 10.26 feet.
Step-by-step explanation:
A=lw+l(w
2)2+h2+w(l
2)2+h2=0.8·0.8+0.8·(0.8
2)2+62+0.8·(0.8
2)2+62≈10.26131
The perimeter may not be small enough to measure with just a ruler. For example, if a side of a rectangle was 30 inches, how would you use a 12 inch ruler to accurately measure that side? Also, if you were measuring a shape like a circle or oval, a tape measure is flexible.
