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lesya692 [45]
3 years ago
10

Someone plz help me, thx:)

Mathematics
1 answer:
bija089 [108]3 years ago
4 0

\pi=\dfrac{\text{circumference of a circle}}{\text{diameter of a circle}}\\\\\pi=3.14159265359...\\\\\pi\ it's\ irrational\ number\\\\the\ irrational\ number\ is\ real\ number\\\\Therefore\ your\ answer:\\\\\boxed{\text{irrational numbers}}\\\boxed{\text{real numbers}}

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∆ ABC is isosceles with AB= AC= 7.5cm and BC= 0 cm .the height AD from A to BC, is 6cm . find the area of ∆ ABC what will be the
lora16 [44]

I have attached an image of the triangle.

BC = 9 cm

Answer:

CE = 7.2 cm

Step-by-step explanation:

In the attached triangle, we see that;

AB = AC = 7.5cm

BC = 9 cm

AD = 6cm

BC = 9cm

Formula for area of triangle is given as;

A = ½bh

Where b is base and h is height.

For the ∆ ABC with BC as base,

Area = ½ × 9 × 6 = 27 m²

Similarly, For ∆ ABC with AB as base,

Area = ½ × 7.5 × CE

Now, area from earlier is 27 cm²

Thus;

½ × 7.5 × CE = 27

Multiply both sides by 2 to get;

7.5CE = 54

CE = 54/7.5

CE = 7.2 cm

3 0
3 years ago
What is the area of the rectangle?
dedylja [7]

Answer:

22

Step-by-step explanation:

11 x 2 = 22

5 0
3 years ago
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Solve the linear equation<br> x + y = 2<br> 2x + 2y = -6
Finger [1]

Answer:

Step-by-step explanation:

3 0
3 years ago
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What is the volume of a sphere with a radius of 7 cm? Sphere V = 4 3 πr3 1. Substitute the radius into the formula:    V = 4 3 π
netineya [11]

Answer:

1436.75504 or 1372/3π cm^3

Step-by-step explanation:

The volume of a sphere can be found using:

V = 4/3 πr^3

We know the radius is 7, so we can substitute 7 in for r

V = 4/3 π7^3

Evaluate the exponent

V = 4/3 π 343

If we want the answer in terms of pi, multiply the two other numbers, that are not pi: 4/3 and 343.

v= (4/3*343)π

v=1372/3π

If we want an exact answer, multiply 1372/3 and pi

v=1436.75504

So, the volume is 1436.75504 or 1372/3 π cm^3

4 0
3 years ago
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3 1/2 • 4 3/4 please help
Dmitry [639]

Answer: 16 5/8

Step-by-step explanation:

3 1/2 = 7/2

4 3/4 = 19/4

7/2 * 19/4 = 133/8 or 16 5/8

3 0
3 years ago
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