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Grace [21]
3 years ago
7

What is the LATERAL surface area of the rectangular pyramid below???

Mathematics
2 answers:
kherson [118]3 years ago
5 0

684 ft²

Area of rectangle :-

A = 18 ft * 20ft

A = 360 ft²

Area of 2 triangles :-

A = 2 * 8ft * 18 ft * 1/2

A = 144 ft²

Area of 2 triangles :-

A = 2 * 1/2 * 9ft * 20ft

A = 180 ft²

Total Area :-

A = ( 360 + 144 + 180 ) ft²

A = 684 ft²

emmasim [6.3K]3 years ago
4 0

Answer:

684 sq.ft

Step-by-step explanation:

(1) The base area of the pyramid is 18x20=360 sq.ft

(2) The Triangles of the pyramid:

  1. There are two kinds of the triangles.

  2. Smaller one: 18x8/2 (base times height divide 2)=72 sq.ft

  3. Bigger one: 20x9/2=90 sq.ft

  4. There are two of them so 72+72+90+90=324 sq.ft

And so 360+324=684 sq.ft.

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The sum of two numbers is 153. The larger number is twice the smaller number. Find both numbers.
romanna [79]

Answer:

The 2 numbers are

102 and 51

Step-by-step explanation:

A + B = 153

A=2B

So 2B+B=153

3B=153

B=153/3=51

A=51*2=102

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3 years ago
What is the image point of (-1, 1) after a translation right 2 units and<br> down 1 unit?
hram777 [196]
1,0 should be right :)
7 0
3 years ago
Please explain your answer.
Setler79 [48]
In the original problem flip the second half to do the multiplication

5 0
4 years ago
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If a || b, m∠2 = 63°, and m∠9 = 105°, find the measure of each missing angle.
Ne4ueva [31]

Given that a || b, m∠2 = 63° and m∠9 = 105°.

Now, all the angles are as follows:

m∠5= m∠2 = 63° [vertically opposite angle]

m∠7= m∠9=105° [vertically opposite angle]

m∠8= 180°-m∠9=180°-105°=75° [Supplementry angles, m∠8+m∠9=180°]

m∠10= m∠8= 180° [vertically opposite angle]

m∠6= m∠8=75° [ Alternate angles]

m∠3= m∠6=75° [vertically opposite angle]

m∠1= 180°-(m∠2+m∠3)=180°-(63°+75°)=42° [as m∠1+m∠2+m∠3=180°]

m∠4= m∠1=42° [vertically opposite angle]

m∠11=m∠4=42° [ Alternate angles]

m∠13= m∠11=42° [vertically opposite angle]

m∠12= 180°-m∠11=180°-42°=138° [as m∠8+m∠9=180°]

m∠14 = m∠12=138° [vertically opposite angle]

4 0
3 years ago
What is the slope of the line whose equation is -2y = -3x + 5?
barxatty [35]

Answer:

m = \frac{3}{2}

Step-by-step explanation:

Use the slope-intercept form <em>y = mx + b</em> to find the slope <em>m</em>.

In this way, we can conclude that we can write it in slope-intercept form, <em>y = mx + b:</em>

y = \frac{3}{2} x - \frac{5}{2}

Your correct answer would be:

y = \frac{3}{2} x - \frac{5}{2}

Have a marvelous day.

7 0
3 years ago
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