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Savatey [412]
3 years ago
13

Find the surface area of a pyramid

Mathematics
1 answer:
Sergeeva-Olga [200]3 years ago
5 0

Answer:

88 inches ^2

Step-by-step explanation:

Well find the side of a triangle first.

4*9=26

26/2=18

There are 4 identical triangles

18*4= 72

Now the bottom square

4*4=16

16+72= 88

88 inches ^2

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The diameter of a semicircle is 8 kilometres. What is the semicircle's perimeter?
Andrei [34K]

Answer:

4pi + 8 km

Step-by-step explanation:

the circumference of teh circle is d*pi = 8pi. since this is a semicircle the circumference is 4pi. then the perimeter is 4pi + 8

7 0
2 years ago
Can someone please help?
Helga [31]

Answer:

(-2,1) (-3,0)

Step-by-step explanation:

It hits on the line

7 0
3 years ago
Determine if the expression r - 5√r+r² is a polynomial or not. If it is a
rewona [7]

The expression r - 5√r+r² is a polynomial.

<h3>What is a polynomial?</h3>

Mathematical expressions called polynomials have one variable and many exponents.

The algebraic expression must have all of its exponents be non-negative integers in order for it to be a polynomial. As a general rule, an algebraic expression isn't a polynomial if it contains a radical.

No part of an algebraic expression should be - Variables' square roots. variable powers that are fractional. variable powers that are negative. variables in any fraction's denominator.

Exponents, variables, and constants make up a polynomial. The amount of terms a polynomial has determines its name.

Polynomials come in various varieties. Monomial, binomial, and trinomial, respectively.

The idea of the graph of a polynomial equation was first introduced by René Descartes in La géometrie, published in 1637.

To learn more about polynomial refer to:

brainly.com/question/2833285

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8 0
1 year ago
Read 2 more answers
For what value of x is the rational expression below equal to zero 20+2x/5-x
Yuliya22 [10]
\frac{20+2x}{5-x}=0;\ \ \ \ D:x\neq5\\\\\frac{20+2x}{5-x}=0\iff20+2x=0\\\\2x=-20\ \ \ \ /:2\\\\x=-10\in D
4 0
3 years ago
Given: ABCD is a parallelogram.<br> Prove: AB = CD and BC = DA<br><br> answers are in image.
True [87]

Answer:

ASA theorem (angle side angle)

Step-by-step explanation:

ac is congruent to ac bc of reflexive property.

and bc you found the other two angles using alternate interior angle theorem, it's safe to use angle side angle. if two angles and a side is congruent between the two triangles, then the two sides are congruent.

3 0
3 years ago
Read 2 more answers
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