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alisha [4.7K]
2 years ago
7

What is the area of a rectangle if the length is 12 cm and the width is 7 cm?

Mathematics
2 answers:
Zepler [3.9K]2 years ago
8 0

Answer:

84

Step-by-step explanation:

you would multiply the length versus the width

frozen [14]2 years ago
8 0

Answer:

12×7==========N

Step-by-step explanation:

12×7=84, cause the formula of looking for the area is A=L×W

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Question: Consider the similarity transformation of ΔABC to produce ΔEDF.
german

Answer:

see the explanation

Step-by-step explanation:

we have triangle  ΔABC

step 1

Rotate 90 degrees clockwise ΔABC about point C to obtain ΔA'B'C'

Remember that

A rotation is a rigid transformation

An object and its rotation are the same shape and size, but the figures may be turned in different directions

so

ΔABC and ΔA'B'C' are congruent

ΔABC≅ ΔA'B'C

step 2

Dilate the triangle ΔA'B'C' to obtain triangle ΔEDF

Remember that

A dilation is a non rigid transformation

A dilation produces similar figures

If two figures are similar, then the ratio of its corresponding angles is proportional and its corresponding angles are congruent

Find the scale factor of the dilation

The scale factor is equal to the ratio of corresponding sides

In this problem

Let

z ----> the scale factor

so

z=\frac{ED}{AB}=\frac{DF}{BC}=\frac{EF}{AC}

Multiply the length sides of triangle ΔA'B'C' by the scale factor z to obtain the length sides of triangle ΔEDF

Note: in this problem the scale factor z is less than 1

That means ----> the dilation is a reduction

3 0
3 years ago
1 and 2 are supplements, 3 and 4 supplements and 1 =4. prove 2=3<br>​
Ne4ueva [31]

Step-by-step explanation:

Supplementary angles are angles that have the sum of their angles to be 180°. Hence if <1 and <2 are supplements, then <1+<2 = 180°.... 1

Similarly if <3 and <4 are supplements, then <3+<4 = 180° ....... 2

Equating the left hand side of both equations since they are both equal to 180°, we will have;

<1+<2 = <3+<4 ....... 3

From the question we are told that <1 = <4, substituting this condition into equation 3;

From 3; <1+<2 = <3+<4

<4+<2 = <3+<4 (since <1 = <4)

subtract <4 from both sides

<4+<2 -<4= <3+<4 -<4

<2 = <3 (Proved!)

5 0
3 years ago
Read 2 more answers
Britney lost $450 on investment which was 45% of the money she invested how much money did she invest ?
Whitepunk [10]
She would have invested $1,000 because 1,000x0.45=450. I hope that helped you!
5 0
3 years ago
Given the following diagram, find the missing measures.​
Deffense [45]

Angle O and P are the same.

Subtract angle 1 from 180 and divide by 2:

Angle O = 180-36 /2

Angle O = 144 /2

Angle O = 72

3 0
3 years ago
Read 2 more answers
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Savatey [412]

Answer:

(a) mintutes, seconds

(b) Randomly pick 55 students to run a lap around the track and measure their times

Step-by-step explanation:

(a) When measuring distance like running you measure it in minutes and seconds

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Randomly pick 55 students to run a lap around the track and measure their times.

6 0
2 years ago
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