What is the surface area of this triangular pyramid?

Mathematics

2 answers:

alexgriva [62]3 years ago

8 0

40.75 m^2

Step-by-step explanation:

The formula for the surface area of a pyramid is:

$SA=B+\frac{1}{2}l(numberofbasesides)(b)$

Since B is the area of the base, we will find the area of the base first. In this case, the base is a triangle.

The formula for the area of a triangle is:

$A=\frac{1}{2}bh$

$A=.5*5*4.3$

A = 10.75

Now that we have the value of B, we can plug everything into the equation and solve. The cursive L, which means the lateral height, is 4. The number of base sides is 3, which you can just count. Lastly, the base is 5, which is the side of the base triangle.

$SA=10.75+.5*4*3*5$

$SA=$

40.75 m^2

Simora [160]3 years ago

5 0

Answer: 10 + 10.75 + 10 = 30.75 (but it could also be 31.5)

Step-by-step explanation: ???

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17 Q Graph the inequality n a coordinate plane

aliina [53]

The resultant graph is shown in the attached image.

Explanation:
Before we begin, remember that when we multiply by a negative sign, we flip the sign of the inequality
The given inequality is:
-y ≤ 3x - 5
We will multiply both sides by -1 to get a positive y vale. This will give us:
y ≥ -3x + 5

Now, to graph the inequality, we will first draw the line y = -3x + 5 and then shade the region having y values greater than the line.
To know the region, you will simply use trial and error method for random points on the two sides of the line.

The final solution would be as shown in that attachment.

Hope this helps :)