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MrRa [10]
3 years ago
7

a shape is made of 12 right triangles of equal size each right triangle has a base of 4 cm and a height of 5 cm what is the tota

l area in square centimeter of the shape
Mathematics
1 answer:
OLEGan [10]3 years ago
7 0

Answer:

Step-by-step explanation:

The area  of a triangle is equal to half the product of its length (L) because of its height (h).

The base of the triangles is  

The height of the triangles is  

Then the area of one of the triangles is:

The figure is formed by 12 equal triangles, then the area of the figure  is:

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3 years ago
The ratio of the angles of a triangle is 5:2/3:1. what are the measures of all three angles​
Art [367]

The ratio of the angles of a triangle is 5: 2/3: 1 Then the measure of all three angles are 135, 18, 27 respectively.

<u>Solution:</u>

Given that, the ratio of the angles of a triangle is 5: \frac{2}{3}: 1

We have to find what are the measures of all three angles.

Let us suppose, "x" is the highest common factor of three angles.

Then, the three angles will be 5x, \frac{2}{3}x, x

Now, we know that, sum of angles of a triangle equals to 180

\text { Then, } 5 x+\frac{2}{3} x+x=180

\begin{array}{ll}{\rightarrow} & {6 x+\frac{2}{3} x=180} \\\\ {\Rightarrow} & {x\left(6+\frac{2}{3}\right)=180} \\\\ {\Rightarrow} & {x\left(\frac{6 \times 3+2}{3}\right)=180} \\\\ {\Rightarrow} & {x\left(\frac{18+2}{3}\right)=180} \\\\ {\Rightarrow} & {x \times \frac{20}{3}=180} \\\\ {\Rightarrow} & {x=180 \times \frac{3}{20}} \\\\ {\Rightarrow} & {x=9 \times 3=27}\end{array}

So, the three angles will be,

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Hence, the angles of the triangle are 135, 18, 27 respectively.

8 0
4 years ago
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scZoUnD [109]
12 - (-2) (-4)

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A negative times a negative equals a positive value.

-2*-4 = 8

12 - 8 = ?

12-8 = 4

Because 4+8 = 12

Final answer:   4
8 0
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