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lozanna [386]
3 years ago
15

How to find the area of a polygon

Mathematics
1 answer:
ipn [44]3 years ago
6 0
The rectangle is 7 x 4 so the area is 28 sq cm
The triangle has a base of 4 and a height of 3.
The formula is A = 1/2 * b*h
You have 2 triangles so:
2(1/2)*4*3= 12 sq cm
Add together:
28 + 12= 40 sq cm
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I don't understand what to do. can u please answer these questions
MariettaO [177]
I believe you will need to find what -0.125 of an inch is, subtract that from 16, then divide that into 11.
6 0
3 years ago
What is 3 and 5? And show how to solve plz
nataly862011 [7]

Answer:

3. 9n + 6 = 78

5. see below

Step-by-step explanation:

3.

Let the number of adults be n. Each adult ticket costs $9, so the cost of n adult tickets is 9n. There is only one child, and a child's ticket is $6, so the cost of the child's ticket is 6. Adding the costs, you get 9n + 6. The total cost is $78, but the expression representing the total cost is 9n + 6, so 9n + 6 must equal 78. That is the equation.

9n + 6 = 78

5.

Sam bought equal gifts for his two children. The two gifts had the same price, x. He received a discount of $125. How much did each of the two gifts cost before the discount?

5 0
3 years ago
If θ is an angle in standard position whose terminal side passes through (3, 4), evaluate tan(1/2)θ.
aleksandr82 [10.1K]

The tangent half angle formula, one of several, is

\tan \dfrac a 2 = \dfrac{1 - \cos a}{\sin a}

We have θ is opposite 4 in the 3/4/5 right triangle so

\cos \theta = \dfrac{3}{5}

\sin \theta = \dfrac{4}{5}

\tan \dfrac{\theta}{2} = \dfrac{1 - 3/5}{4/5} = \dfrac{5-3}{4}=\dfrac{1}{2}

Answer: 1/2

This is actually pretty deep.  It says half the big acute angle in the 3/4/5 triangle is the small diagonal angle of the 1x2 rectangle.   Similarly, the small acute angle in 3/4/5 triangle is twice the small diagonal angle of the 1x3 rectangle.

7 0
3 years ago
jessie has some chickens and rabbits. there are 30 heads and 76 legs in all. How many chickens and rabbits does jessie have?
Nataly_w [17]

Answer:106

Step-by-step explanation:

30+76=106

7 0
3 years ago
Find the circumference and the area of a circle with diameter 6yd . Use the value 3.14 for π , and do not round your answers.
wel
It would be 18.85yd.
7 0
3 years ago
Read 2 more answers
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