Select the best answer for the question: All rhombuses are?

Mathematics

2 answers:

gizmo_the_mogwai [7]3 years ago

8 0

Answer:

Parallelograms

Explanation:

All rhombuses are parallelograms but not all parallelograms are rhombuses.

The answer could be kites if that is a choice.

gavmur [86]3 years ago

7 0

Answer:

A parallelogram

Step-by-step explanation:

Opposite sides are always parallel, and opposite angles are always equal (which means they are all Parallelograms)

Hope this helps

You might be interested in

Fill in the missing number: 2, 8, 27, 85, 260, _, 2365

nexus9112 [7]

Each number is mutliplied by 3 and then numbers 2,3,4,5,... are added successively.

2*3+2=8

8*3+3=27

27*3+4=85

85*3+5=260

260*3+6=786

So it's 786.

Btw, the general formula for this sequence is $a_n=\dfrac{1}{12}(-6n+13\cdot3^n-9)$

6 0

4 years ago

Sin∅=√3-1/2 find approximate value of sec∅(sec∅+tan∅)/1+tan²∅

Neko [114]

Answer:

The approximate value of $f(\theta) = \frac{\sec \theta \cdot (\sec \theta+\tan \theta)}{1+\tan^{2}\theta}$ is 1.366.

Step-by-step explanation:

Let $f(\theta) = \frac{\sec \theta \cdot (\sec \theta+\tan \theta)}{1+\tan^{2}\theta}$ , we proceed to simplify the formula until a form based exclusively in sines and cosines is found. From Trigonometry, we shall use the following identities:

$\sec \theta = \frac{1}{\cos \theta}$ (1)

$\tan\theta = \frac{\sin\theta}{\cos \theta}$ (2)

$\cos^{2}+\sin^{2} = 1$ (3)

Then, we simplify the given formula:

$f(\theta) = \frac{\left(\frac{1}{\cos \theta} \right)\cdot \left(\frac{1}{\cos \theta}+\frac{\sin \theta}{\cos \theta}\right) }{1+\frac{\sin^{2}\theta}{\cos^{2}\theta} }$