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Serggg [28]
3 years ago
14

The base of a triangle is 3 cm and the height is 5 cm. What mathematical operation(s) described must be performed in order to fi

nd the area of this triangle?
A) multiply 3 and 5
B) add 3 and 5, then divide the sum by 2
C) multiply 3 and 5, then divide the product by 2
D) use the Pythagorean theorem to find the missing sides of the triangle and then add the three sides together
Mathematics
2 answers:
Hatshy [7]3 years ago
8 0
C, because Formula of right triangle is base multiply by height and then divide the sum by 2
Firdavs [7]3 years ago
6 0

Answer:

C.

Step-by-step explanation:

To find the area of a triangle, one must multiply the base by the height then divide by 2.

So, the area of this triangle would be 7.5

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A, B, and C are collinear, and B is between A and C. The ratio of AB to BC is 1:4.
schepotkina [342]

Let point C has coordinates (x_C,y_C). Consider vectors

\overrightarrow{AB}=(x_B-x_A,y_B-y_A)=(8-9,6-9)=(-1,-3),\\ \\\overrightarrow{BC}=(x_C-x_B,y_C-y_B)=(x_C-8,y_C-6).

Since the ratio AB to BC is 1:4, you have that

\dfrac{-1}{x_C-8}=\dfrac{1}{4}\quad \text{and}\quad \dfrac{-3}{y_C-6}=\dfrac{1}{4}.

Find x_C and y_C:

x_C-8=-4,\\ \\x_C=-4+8=4,\\ \\y_C-6=-3\cdot 4=-12,\\ \\y_C=-12+6=-6.

Answer: C(4,-6)

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Read 2 more answers
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