Question

Q1.
The perimeter of an isoscele
each of the equal sides. Find the area
osceles triangle is 42cm and its base is 3/5
s. Find the area and height of the triangle
---
-
Represent the following in the form of a
(1) 0.00352
() 0.001
(1) 23.43
Q3. Show that txa-6 + 1+ 2b-a - 1.
.
1+ya-
b
14b-a
Q4. Represent 7.1 on the number line.
Q5.
Plot the points M(-3,4) and
he points M(-3.4) and N (5.4). Draw the line segment MN. Wha
the coordinates of the mid point of line segmen
int of line segment MN.
Q6.
Find the percentage increase
its each side is doubled.
percentage increase in the area of an equilateral triangle if
venkateshwar international school
Q7.
A point lies on the x axis at a
a distance of 7 units from the y axis. What
na coordinates? What will be its coordinates if it lies on y axis at a distan
of -7 units from the x axis.
In AABC, the internal bisectors of B & C meet at P and the external
sectors of ZB & C meet at 0. Prove that ZBPC + ZBQC = 180°
09. Plot the points (1,1). (2.-3) and (-1,-2) and check whether they are
collinear or not?
Q10. Find the value of xif 2x+3= 4*-1.
Q11. The area of an equilateral triangle is 16V3 m. Find its perimeter.
Q12. Simplify the following by rationalising the denominator.​

Answer 1

Answer:

Step-by-step explanation:

Let the congruent sides of the isosceles triangle =a and the base =b.

Given, b=1 1/2 ×a= 3/2 ×a

Perimeter of the triangle = Sum of all sides = a

∴a+a+b=42

2a+ 3/2 ×a=42

7/2 a=42

∴a=12cm