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A triangle in which two sides are of equal lengths is called _______________.
The sum of the lengths of any two sides of a triangle is _____________ the third side of the triangle.
In the Pythagoras property, the triangle must be ___________ .
Find the value of x in this figure.
Find the value of x in given figure.
Exterior angle is equal to sum of interior opposite angles so,
120 = 60+x
x = 60^{°}
Median is a line joining the vertex and middle of the opposite side, and hence dividing the triangle in two equal parts. So PD is the median.
The value of x in the adjoining figure is
What is the value of x in the below figure.
Find the value of unknown x in the adjoining figure.
ΔABC is rightangled at C. If AC = 5 cm and BC = 12 cm find the length of AB.
AB^{2}=AC^{2}+BC^{2}=5^{2}+12^{2}=25+144 = 169
AB=13 cm
ΔPQR is a triangle rightangled at P. If PQ = 3 cm and PR = 4 cm, find QR.
Using pythagoras theorem,
QR^{2 }= PR^{2 }+ PQ^{2}
4^{2}+3^{2}
=16+9=25
QR = 5cm
Which is the longest side in the triangle PQR right angled at P?
Which is the longest side in the triangle ABC right angled at B?
Which is the longest side of a right triangle?
Since the two sides are equal, the angles opposite to them are also equal. So x+45° + 45° = 180°, x = 90°
The value of x in the adjoining figure is
A triangle in which all three sides are of equal lengths is called _________.
Since the two sides are equal, the angles opposite to them are also equal to the adjacent angle of 120° which is equal to 180°  120° =60° is equal to x. So x = 60°
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