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3 years ago

1. What is the surface area of the pyramid below 6 , 5.2 ,8.2

Mathematics

1 answer:

oksano4ka [1.4K]3 years ago

4 0

128.22? I’m not sure if it’s right because you did not specify the base length, width or height.

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Can someone help me with this

nordsb [41]

Answer:

63.2

Step-by-step explanation:

So, we can break this shape into 2 shapes. A trapezoid and a rectangle.

For the trapezoid, we can do the formula.

((2.8 + 7.2)4)/2 = 20

Next, we can do the rectangle.

6 x 7.2 = 43.2

Now we can add them up and get our final answer.

43.2 + 20 = 63.2

5 0

3 years ago

Solve for x and y then find angle ABE

Soloha48 [4]

Answer: x is 9° , y is 21°. The measure of angle ABE is 48°.

Step-by-step explanation:

First we will solve for x.

The variable x appears in the angle 8x + 18 and that angle is a right angle.

Right angles have the measure of 90 degrees so we will set the angle equal 90 and solve for x.

8x + 18 = 90 Subtract 18 from both sides

- 18 -18

8x = 72 divide both sides by 8

x = 9

y is also on the right side and the combination of both angles has to also equal 90 degrees because they form a right angle.

Since we already know x is 9 we will input it into the left side for x and solve for y.

y + 3(9) + 2y = 90

3y + 27= 90

-27 -27

3y = 63

y = 21

Now we need to find the measure of angle ABE.

ABE is represented by y + 3x so since we know the value of y and x we will input it into the expression and solve for the angle.

21 + 3(9) = m∠ABE

21 + 27= m∠ABE

48 = m∠ABE

This means the measure of angle ABE is 48°

5 0

3 years ago

3,6,2,9 use each digit once,make the smallest 4digit number

Andrei [34K]

Answer:

2369

Step-by-step explanation:

3 0

3 years ago

Given: AB ≅ CD and AD ≅ BC

enot [183]

Answer:

SSS congruency theorem ⇒ 3rd answer

Step-by-step explanation:

* Lets revise the cases of congruent

- SSS ⇒ 3 sides in the 1st Δ ≅ 3 sides in the 2nd Δ

- SAS ⇒ 2 sides and including angle in the 1st Δ ≅ 2 sides and

including angle in the 2nd Δ

- ASA ⇒ 2 angles and the side whose joining them in the 1st Δ

≅ 2 angles and the side whose joining them in the 2nd Δ

- AAS ⇒ 2 angles and one side in the first triangle ≅ 2 angles

and one side in the 2ndΔ

- HL ⇒ hypotenuse leg of the first right angle triangle ≅ hypotenuse

leg of the 2nd right angle Δ

* Lets complete the missing

- Given: AB ≅ CD and AD ≅ BC

- Prove: ABCD is a parallelogram

* Statements Reasons

1. AB ≅ CD ; AD ≅ BC given

2. AC ≅ AC reflexive property

3. △ ADC ≅ △ CBA <u>SSS congruency theorem</u>

- The three sides in Δ ADC equal the three sides in ΔCBA,

then the two triangles are congruent by SSS theorem

∴ The missing reason in step 3 is SSS congruency theorem

7 0

3 years ago

Read 2 more answers

What’s the answers?...

zmey [24]

Answer:

$x=10$

$z=2$

$y=5$

Step-by-step explanation:

We know the triangles are congruent, therefore, each corresponding side of the triangle is also congruent!

1) Set EF≅CB

$x+15=2x+5$

$x+10=2x$

$x=10$

2) Set ED≅CA

$10z-5=3z+9$

$10z=3z+14$

$7z=14$

$z=2$

3) Set DF≅AB

$4y=8y-20$

$-4y=-20$

$y=5$

4 0

3 years ago