Question

In triangle ABC , M and N are the mid points of sides AB and AC . If the length of BC is 15 cm then length of MN is

Answer 1

Answer:

i am sorry to say that I could not draw the figure for the questions that you asked as i dont see any features here in .

Solution

Given: BC=15 cm

Since the points M and N are the mid points of AB and AC.

As per mid-point theorem,

MN=1/2(BC)

MN= 1/2(15 cm )

MN=15/2 cm

MN = 7.5 CM

Answer 2

Given:

The length of BC=15cm

To find:

The length of MN

Solution:

The length of MN is 7.5cm.

We can find the length of MN by following the steps given below-

We know that the line that joins the mid-points of two sides of a triangle is parallel to the third side and is equal to half of it.

In ΔABC, it is given that M and N are the midpoints of AB and AC.

So, the line MN is parallel to BC and equal to its half.

We now know that the length of MN should be half of BC.

MN=1/2 of BC

=1/2×BC

=BC/2

We are given that the length of the line BC=15cm

Using the value of BC, we get

MN=15/2

MN=7.5cm

Therefore, the length of MN is 7.5cm.