9. The perimeter of a square is (4x+20)cm. What will be the length of its diagonal?
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Answer:
Draw a line BC parallel to AD
Draw a perpendicular line BE on DF
ABCD is a parallelogram.
BC=AD=25cm
CD=AB=60cm
CF=77-CD=17cm
For Δ BCF
perimeter of triangle=(25+26+17)/2
=68/2=34
By Heron's Formula of triangle=√s(s-a)(s-b)(s-c)
=√34(34-25)(34-26)(34-17)
=204cm²
Now area of ΔBCF=1/2xbase x height
=1/2 BExCF204cm²
=1/2x BEx17BE
=408/17
=24cm
Area of Trapezium =1/2(AB+DF)xBE
=1/2(60+77)x24
=1644cm²
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0
Answer:
Unit 1(Introduction to HTML)
1. Which of the following is an attribute for font?
a.Size
b.text
c. align
d. type
2.Which tag is used to display the title of the web
page? a.<title> b. <head>
c. <body> d. <img >
3.which tag is used to make the text bold?
a.<i> b. <small> c.<b> d. <u>Unit 1(Introduction to
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