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3 years ago

How many lines of reflectional symmetry does an equallaterial triangle have

1 answer:

4 0

3. It has 3 symmetrical lines, so, therefore, has 3 lines of reflectional symmetry.

Hope this helps!
~cupcake 

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CAN SOMEONE PLS HELP ME ON THIS ONE.....

r-ruslan [8.4K]

Answer:

Years 3-4 and the percentage change was by 8%. Please vote Brainliest!

Step-by-step explanation:

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3 years ago

Read 2 more answers

An exterior angle of a triangle equals _______ minus the adjacent interior angle.

insens350 [35]

As isosceles triangle has two congruent sides with a third side
that is the base. 

A base angle of an isosceles triangle is one of the angles formed by 
the base and another side. Base angles are equal because of the 
definition of an isosceles triangle. 

A picture would probably help here: 

A 
. 
/ \ ABC = ACB = 39 degrees 
/ BAC = ??

._______________. 
B C 
base 
ABC is the isosceles triangle. AB is congruent to AC. Angle ABC 
is congruent to angle ACB. These are the base angles. 
Triangle is a convex polygon with three segments joining three non-collinear points. Each of the three segments is called a side, and each of the three non-collinear points is called a vertex. 
Triangles can be categorized by the number of congruent sides they have. For instance, a triangle with no congruent sides is a scalene triangle; a triangle with two congruent sides is an isosceles triangle; a triangle with three congruent sides is an equilateral triangle. 
Triangles can also be categorized by their angles. For instance, a triangle with three acute interior angles is an acute triangle; a triangle with one obtuse interior angle is an obtuse triangle; a triangle with one right interior angle is a right triangle; a triangle with three congruent interior angles is an equiangular triangle. 
One property of a triangle is that the sum of the measures of the three interior angles is always 180 degrees (or pi radians). In addition, the exterior angle of a triangle is the supplement of the adjacent interior angle. The measure of the exterior angle is also the sum of the measures of the two remote interior angles.

5 0

3 years ago

Read 2 more answers

When 0.3(4x - 8) - 0.5(2.4x + 4) is simplified what is the resulting expression?

LUCKY_DIMON [66]

0.3(4x-8)-0.5(2.4x+4)
1.2x-2.4-1.2x+2
x-0.4

4 0

3 years ago

In the diagram, ΔPMN ≅ ΔQSR If QR = 20 in., RS = 7 in., and SQ = 24 in., what is PN

Tamiku [17]

PN=20
Because,/_\PMN_~/_\QSR

6 0

3 years ago

Read 2 more answers

I need the answer to a parts I-iii and the answer to b

fomenos

Answer:

i) Mean = 72

ii) Median = 72

iii) Mode = 72

69, 70, 71, 72, 72, 72, 73, 74, 75

Step-by-step explanation:

a. To find mean, median and mode

It is given that all the 9 students get 72 marks.

Therefore the data set be,

72, 72, 72, 72, 72, 72, 72, 72 72

i) mean = (sum of data)/(total number of data)

= (9 * 72)/9 = 9

ii) Median - Central data in the data set when arranging ascending or descending order

72, 72, 72, 72, 72, 72, 72, 72 72

Median = 72

iii) Mode - Most repeating data in the data set

Here mode = 72

b). To find a data set

69, 70, 71, 72, 72, 72, 73, 74, 75

Here Mean, mode and median are all 72

3 0

3 years ago