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bekas [8.4K]
3 years ago
14

The perimeter of a rectangle is 20 cm. The length is 7 cm. What is the area?

Mathematics
1 answer:
Natalka [10]3 years ago
8 0
Hey there!

So we know the perimeter is 20 cm. Let's make our formula for this.

2L + 2W = 20

The formula for the area of a rectangle is L x W. Let's make this into our formula and fill it in as time goes.

L x W

Our Length is measured at 7 cm, so let's fill that into our formulas.

2(7) + 2W = 20
7 * W = x

Let's use some basic algebra to solve for our perimeter.
2(7) + 2W = 20
14 + 2W = 20
2W = 6
W = 3

This means our Width is 3. Now all we have to do is solve for our area since we have our dimensions.

7 x 3 = 21

The area of the rectangle is 21 cm^2.

I  hope this helps!
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Need a little help here pls
Crank

Answer:

The statements that must be true are:

XY and JK form four right angles ⇒ B

XY ⊥ JK ⇒ C

JP = KP ⇒ E

m∠JPX = 90° ⇒ F

Step-by-step explanation:

From the given figure

∵ Line XY is the perpendicular bisector of the line segment JK

→ That means line XY is the line of symmetry of the line segment JK

∴ XY ⊥ JK ⇒ C

∵ XY ∩ JK at point P

∴ P is the midpoint of JK

∵ XY ⊥ JK

∴ ∠JPX, ∠KPX, ∠JPY, and ∠KPY are right angles

∴ XY and JK form four right angles ⇒ B

∵ The measure of the right angle is 90°

∴ m∠JPX = m∠KPX = m∠JPY = m∠KPY = 90°

∴ m∠JPX = 90° ⇒ F

∵ P is the midpoint of JK

∴ JP = KP ⇒ E

4 0
3 years ago
25 POINTS PLEASE HELP
Minchanka [31]

Answer:

corresponding angles

1=5

3=7

2=6

4=8

alternative exterior

2=7

1=8

alternative interior

4=5

3=6

3 0
3 years ago
Read 2 more answers
Five dogs were running in a race. Bandit completed the race 10 seconds after Sergeant and 30 seconds before Sally. Smokey comple
ipn [44]

Answer:

The Answer is D

Step-by-step explanation:

7 0
4 years ago
Jess owns 8 acres of land. She wants to divide it into lots of 25 of an acre.Use the drop-down menus to write an equation she ca
Korvikt [17]

Answer:

200

Step-by-step explanation:

I mean this one is pretty simple. all you do is 8*25 because she has 8 acres and each acre is divided into 25

5 0
2 years ago
Read 2 more answers
Round 3 to 2-5+4+21+1666666-2times 43
yKpoI14uk [10]
<span><span><span><span><span>I am so sorry if this is wrong, but
2−5</span>+4</span>+21</span>+1666666</span>−<span>(2)(43)
</span></span><span>=<span><span><span><span>−3+4</span>+21</span>+1666666</span>−<span>(2)(43)
</span></span></span><span>=<span><span>1+21+1666666</span>−<span>(2)(43)
</span></span></span><span>=<span>22+1666666−<span>(2)(43)
</span></span></span><span>=<span>1666688−<span>(2)(43)
</span></span></span><span>=1666688−86
</span><span>Your answer would be 1,666,602
Hope this helps!:)</span>
6 0
3 years ago
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