Answer:
2n-9
Step-by-step explanation:
To find the area of the triangle, you will need to know the length of the base and there length of the height.
You can find both of these by using the circles that are given.
If the total length of the circles is 35 cm, then each circle has a length of 7 cm. If these are circles, then each circle has a height of 7 cm also.
A = 1/2 x b x h
1/2 x (4x7) x (2x7)
A = 196 square cm
Answer:
Step-by-step explanation:
Area of a trapezium is the average of the parallel sides times the distance between them.
If we subtract 15 units from each of the parallel sides, we end up with a triangle that has two sides of 8 units and one of 10 units. One of the 8 unit sides is the base and we need to find the height h which is perpendicular to this base.
Let the base be split into two segments, call one A, the other will be 8 - A
From Pythagoras.
10² - A² = h² = 8² - (8 - A)²
10² - A² = 8² - (8 - A)²
100 - A² = 64 - (64 - 16A + A²)
100 - A² = 64 - 64 + 16A - A²
100 = 16A
A = 6.25
h = √(10² - 6.25²)
h = √60.9375
A = ½(15 + 23)√60.9375
A = 148.31870246... ≈ 148.3 cm²
Add two anchors. hope this helps! plz give me brianlist i have little points
The first step to solving your equation would be to subtract 6.4 from both sides.
<span>3.5n+6.4=42.5
Subtract 6.4
3.5n=42.5</span>