Maths-
General
Easy
Question
Calculate the area of equilateral triangle whose height is 25 cm
Hint:
Since it’s an equilateral triangle so all angles are equal to 60°.
The correct answer is: 1.73
It is given that height, h = 25 cm
Let AB = x
We know that all angles are equal to 60°.
Sin A = 
Sin 60° = 
Since all sides are equal BC = 
We know that Area of triangle = 
= 
= 208.33
= 360.84 cm2 ( ∴ = 1.73 )
NOTE – We can use Pythagoras theorem too. Since perpendicular of an equilateral triangle bisects the side, implies that BD = 
. So, in triangle ABD
AB2 = AD2 + BD2
Find x and then use Area of triangle =
Related Questions to study
Maths-
A regular parallelogram ABCD having sides 
The angle between the two sides is 30 degrees. Find the area of parallelogram ABCD
A regular parallelogram ABCD having sides
The angle between the two sides is 30 degrees. Find the area of parallelogram ABCD
Maths-General
Maths-
Calculate the volume of the metal pipe whose inside diameter is 6 cm and whose outside diameter is 8 cm, if it is 20 cm long.
Calculate the volume of the metal pipe whose inside diameter is 6 cm and whose outside diameter is 8 cm, if it is 20 cm long.
Maths-General
Maths-
Find the height of the triangle whose area is 560 cm2 and base is 42 cm
Find the height of the triangle whose area is 560 cm2 and base is 42 cm
Maths-General
Maths-
Find area of triangles
a. Whose height is 5cm and base is 10cm
b. Whose three sides are a = 5 cm, b = 5 cm and c = 8 cm
Find area of triangles
a. Whose height is 5cm and base is 10cm
b. Whose three sides are a = 5 cm, b = 5 cm and c = 8 cm
Maths-General
Maths-
Driver A charges $25 fees and $0.10 per extra mile driven. Driver B charges no fees but charges $0.60 per mile driven. Find the distance in miles for which the two drivers will cost the same money. Also, find the cost.
Driver A charges $25 fees and $0.10 per extra mile driven. Driver B charges no fees but charges $0.60 per mile driven. Find the distance in miles for which the two drivers will cost the same money. Also, find the cost.
Maths-General
Maths-
An artist charges $20 constant fee plus $10 per extra hour he does. Write the linear model and find the charges taken by him if he works for 4 and a half hours.
An artist charges $20 constant fee plus $10 per extra hour he does. Write the linear model and find the charges taken by him if he works for 4 and a half hours.
Maths-General
Maths-
Q...34... NO QUESTION
ONLY SOLUTION
Note:
This type of question is called a word problem. We need to have simple understanding of total cost of the number of items purchased and multiplication. There could be many more items and their costs added in the list. This is the standard method of approaching these problems.
Q...34... NO QUESTION
ONLY SOLUTION
Maths-General
Note:
This type of question is called a word problem. We need to have simple understanding of total cost of the number of items purchased and multiplication. There could be many more items and their costs added in the list. This is the standard method of approaching these problems.
Maths-
If the distance between the shorter sides of a parallelogram is 16 m, the sides of a parallelogram are 24m and 18m. Find the distance between its longer side
If the distance between the shorter sides of a parallelogram is 16 m, the sides of a parallelogram are 24m and 18m. Find the distance between its longer side
Maths-General
Maths-
A Cylindrical tube open at both ends is made of metal. The internal diameter of the tube is 11.2 cm, and its length is 21 cm. The metal everywhere is 0.4 cm. Calculate the volume of the metal correct to 1 place of decimal.
A Cylindrical tube open at both ends is made of metal. The internal diameter of the tube is 11.2 cm, and its length is 21 cm. The metal everywhere is 0.4 cm. Calculate the volume of the metal correct to 1 place of decimal.
Maths-General
Maths-
The base of a right angled triangle is 5cm and hypotenuse is 13cm. Find its area.
The base of a right angled triangle is 5cm and hypotenuse is 13cm. Find its area.
Maths-General
Maths-
The perimeter of the triangle is 44cm. if its sides are in the ratio 9:7:6. Find its area.
The perimeter of the triangle is 44cm. if its sides are in the ratio 9:7:6. Find its area.
Maths-General
Maths-
The sides of a triangle are 8cm, 15cm and 17cm. find its perimeter and its area. Also find the length of the altitude drawn on the side with length 17cm.
The sides of a triangle are 8cm, 15cm and 17cm. find its perimeter and its area. Also find the length of the altitude drawn on the side with length 17cm.
Maths-General
Maths-
The cost of an ice cream scoop is $11 and the cost of additional toppings is $1.50. Find the cost of an ice cream with 4 toppings.
The cost of an ice cream scoop is $11 and the cost of additional toppings is $1.50. Find the cost of an ice cream with 4 toppings.
Maths-General
Maths-
Find the area of an isosceles triangle whose equal sides are of length 15 cm each and third side is 12 cm.
Find the area of an isosceles triangle whose equal sides are of length 15 cm each and third side is 12 cm.
Maths-General
Maths-
A line l touches the Y-axis at point 3 and has slope –3. Find the slope of the line perpendicular to the line l.
A line l touches the Y-axis at point 3 and has slope –3. Find the slope of the line perpendicular to the line l.
Maths-General
