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2 years ago

Area of triangle please help

Mathematics

2 answers:

bazaltina [42]2 years ago

7 0

Answer:

A= 18

Step-by-step explanation:

Taya2010 [7]2 years ago

3 0

Answer:

18 your answer is correct

Step-by-step explanation:

12x3=36

36÷2=18

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deff fn [24]

Answer:

Step-by-step explanation:

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3 years ago

An architect wants to draw a rectangle with a diagonal of 13 centimeters. The length of the rectangle is to be 3 centimeters mor

butalik [34]

Answer:

The rectangle is 3.2 cm by 12.6 cm

Step-by-step explanation:

See attached image for a diagram.

Choose w to represent the width because the length is described by referring to the width: it's 3 more than (add 3) triple (multiplied by 3) the width.

Length = 3w + 3

The diagonal forms two right triangles, each with leg = w, other leg = 3w + 3, hypotenuse = 13.

The Pythagorean Theorem says $(\text{leg})^2+(\text{leg})^2=(\text{hypotenuse})^2$ so

$w^2+(3w+3)^2=13^2\\\\w^2+9w^2+18w+9=169\\\\10w^2+18w-160=0\\\\5w^2+9w-80=0\\$

Now solve using the Quadratic Formula with $a=5,\,b=9,\,c=-80$ .

$w=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\w=\frac{-9\pm\sqrt{81+1600}}{10}\\\\w=\frac{-9\pm\sqrt{1681}}{10}\\\\w=\frac{-9\pm41}{10}\\\\w=-5\text{ or }w=3.2$

The negative root makes no sense as a distance, so the width of the rectangle is 3.2 cm. The length is 3(3.2) + 3 = 12.6 cm.

5 0

3 years ago

Will give brainliest!

den301095 [7]

Answer:

Answer is C multiply 5 by every ticket

Step-by-step explanation:

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3 years ago

The measure of an angle is 6° less than the measure of its complement.

kogti [31]

It’s 3 less then measure of its complement 6°

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3 years ago

Enter the number that belongs in the green box.

IRISSAK [1]

Answer:

90°

Step-by-step explanation:

All sides of the given quadrilateral are 4 units, that is they are equal. Hence it is a RHOMBUS.

Diagonals of a rhombus bisects each other at right angles (90°).

x = 90°

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3 years ago