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pav-90 [236]
3 years ago
7

Someone please help me answer this!!

Mathematics
1 answer:
Scrat [10]3 years ago
4 0

Answer:

b = 9cm is the answer.

Step-by-step explanation:

a = 12cm

b = ?

c = 15cm

By using the Pythagoras theorem,

a² + b² = c²

12² + b² = 15²

144 + b² = 225

b² = 225 - 144

b² = 81

b = 9cm.

∴ b = 9cm is the length of the missing leg.

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Answer:

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To find out how fast a tree grows, you can measure its trunk. A giant red oak's diameter was 248 inches in 1965. The tree's diam
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Find the area of the quadrilateral.
love history [14]

Answer:

320 cm²

Step-by-step explanation:

If 3 units = 12cm

Then 1 unit = 12/3 = 4cm

Formula for Area Trapezoid = height*(base1+base2)/2

Base 1 = 12

Base 2 = 7 * 4 = 28

12 + 28 = 40

40 * (4*4) = 40 * 16 = 640

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3 years ago
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Mila [183]

To find the area of the trapezoid we need to find the height of the trapezoid.

<h2>Trapezoid</h2>

A trapezoid is a quadrilateral which is having a pair of opposite sides as parallel and the length of the parallel sides is not equal.

<h2>Area of Trapezoid</h2>

The area of a trapezoid is given as half of the product of the height(altitude) of the trapezoid and the sum of the length of the parallel sides.

\rm{ Area\ of\ trapezoid = \dfrac{1} {2}\times height \times (Sum\ of the\ parallel\ Sides)

The area of the trapezoid is 54 units².

<h2> Given to us :</h2>

ABCD is a trapezoid

AD=10, BC = 8,

CK is the altitude altitude

Area of ∆ACD = 30

<h2>Area of ∆ACD,</h2>

In ∆ACD,

\begin{gathered}\rm { Area\ \triangle ACD = \dfrac{1}{2}\times base\times height\\\\\ \end{gathered}

Substituting the values,

30 = 1/2 * AD × CK

30 = 1/2 * 10 × CK

(30 * 2)/10 = CK

CK = 6 units

<h2 /><h2>Area of Trapezoid ABCD</h2>

\rm{ Area\ of\ trapezoid = \dfrac{1} {2}\times height \times (Sum\ of\ the\ parallell Sides)

Area ABCD = \frac{1}{2}  \times   ck \times (ad  + bc)

Area ABCD = \frac{1}{2}   \times 6 \times (10 + 8)

Area ABCD = \frac{1}{2}  \times 6 \times  (18)

Area ABCD = 54 units²

Hence, the area of the trapezoid is 54 units².

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