True or false? In an isosceles triangle all sides are unequal.

Mathematics

2 answers:

Setler [38]3 years ago

4 0

An isosceles triangle is a triangle with (no less than) two equivalent sides. In the figure beneath, the two equivalent sides have length and the staying side has length . This property is proportionate to two edges of the triangle being equivalent. An isosceles triangle in this way has both two equivalent sides and two equivalent points. The name gets from the Greek iso (same) and skelos (leg).

A triangle with all sides square with is called an equilateral triangle, and a triangle without any sides approach is known as a scalene triangle. An equilateral triangle is in this way an uncommon instance of an isosceles triangle having not only two, but rather each of the three sides and edges parallel. Another uncommon instance of an isosceles triangle is the isosceles right triangle.

Bogdan [553]3 years ago

3 0

False, an isosceles triangle has 2 equal sides.

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The two solids are similar and the ratio between the lengths of their edges is 2:7 what is the ratio of their surface areas?

vovangra [49]

Answer:

The ratio of their surface areas is $\frac{4}{49}$

Step-by-step explanation:

we know that

If two figures are similar, then the ratio of its corresponding sides is equal and this ratio is called the scale factor

In this problem the scale factor is equal to the ratio $\frac{2}{7}$

and

Remember that

If two figures are similar, then the ratio of its surface areas is equal to the scale factor squared

therefore

In this problem the ratio of their surface areas is $(\frac{2}{7})^{2}=\frac{4}{49}$

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3 years ago

BAC ~ DEC what is the value of x?

Anna007 [38]

Answer: x = 37.8

Step-by-step explanation: We start with triangle ABC with two sides given as 15 and 18. We shall make angle C the reference angle and thereby calculate the third side, line BC.

Since we have the opposite side as 15, and the adjacent side (which lies between the reference angle and the right angle) as 18, we can use the tangent of the angle C

Tan C = Opp/Adj

Tan C = 15/18

Tan C = 0.8333

From our table of values/use of the calculator

Tan C = 39.8

Angle C in triangle ACB = Angle C in triangle ECD (Opposite angles are equal).

That takes us to triangle ECD, since the reference angle is known (39.8) and the opposite side is also given (31.5), we can now calculate the adjacent which is side x.

Tan C = Opp/Adj

Tan 39.8 = 31.5/x

when you cross multiply, x moves to the left hand side, while Tan 39.8 moves to the right hand side

x = 31.5/Tan 39.8

x = 31.5/0.8333

x = 37.8

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3 years ago

What value of x makes the following equation true? 15+3x=3(2−2x)

Alinara [238K]

Answer:

$\boxed {x = -1}$