Which letter has reflectional, rotational, and point symmetry? <br> O<br> P<br> Q<br> L

Lapatulllka [165]

<h2>The area of a triangle is =54 square units</h2><h2>The perpendicular distance from B to AC is = $\frac{108}{\sqrt{149} } units$ </h2>

Step-by-step explanation:

Given a triangle ABC with vertices A(2,1),B(12,2) and C(12,8)

$x_1=2,y_1=1,x_2=12,y_2=2,x_3=12 and y_3=8$

The area of a triangle is= $\frac{1}{2} [x_1(y_2-y_3) +x_2 (y_3- y_1)+x_3(y_1-y_2)]$

= $|\frac{1}{2} [2(2-8+12(8-1)+12(1-2)]|$

= $|-54|$ = 54 square units

The length of AC = $\sqrt{(x_1-x_3)^{2} +(y_1-y_3)^2}$

= $\sqrt{(2-12)^{2} +(1-8)^2}$

= $\sqrt{149}$ units

Let the perpendicular distance from B to AC be = x

According To Problem

$\frac{1}{2} \times x \times \sqrt{149} = 54$

⇔ $x =\frac{108}{\sqrt{149} }$ units

Therefore the perpendicular distance from B to AC is = $\frac{108}{\sqrt{149} } units$

5 0

2 years ago

astra-53 [7]

Hey You!

To solve this question, we must use multiplication:

26 × 50 = 1,300

The computer ordered 1,300 CDs.

5 0

3 years ago

Varvara68 [4.7K]

Answer:

530.66 square cm

Step-by-step explanation:

A=pi*r^2

A=pi*13^2

A=530.66

4 0

2 years ago

Studentka2010 [4]

One pizza serves four people so, you will need 10 pizzas for 40 people so that make the answer (A.)

7 0

3 years ago

Radda [10]

You go on there profile and go to the followers and add whoever you want

Hope this helps

Have a great day/night

5 0

2 years ago

Which letter has reflectional, rotational, and point symmetry? O P Q L