geometry
posted by karan .
the sides of a quadrilateral abcd are 6cm,8cm,11cm and 12cm respectively,and the angle between the first two sides is a right angle.find its area.

draw the diagonal to show the rightangled triangle,
the hypotenuse of that using Pythagoras is 10
so the area of the right_angled triangle is
(1/2)(6)(8) = 24
for the other triangle with sides, 10, 11, and 12
use Heron's formula
Area = √(s(sa)(sb)(sc))
where s = (1/2)(perimeter) = 16.5
sa = 16.510 = 6.5
sb = 16.5  11 = 5.5
sc = 16.5  12 = 4.5
Area = √(16.5*6.5*5.5*4.5) = 51.92
total area = 24+51.92 = 75.52
check my arithmetic 
ABCD is a square and arc BEC is a semicircle. if AB=10.0 cm,find the area of the area of the figure.
Respond to this Question
Similar Questions

Geometry
Given quadrilateral ABCD,ABllDC, diagonal AC. we can prove that angle 1= angle 2, but cannot prove angle 3=angle4 Why is this. What must be true about the sides of the Quadrilateral in order to prove that angle 3 is congruent to angle … 
Geometry
Given quadrilateral ABCD,ABllDC, diagonal AC. we can prove that angle 1= angle 2, but cannot prove angle 3=angle4 Why is this. What must be true about the sides of the Quadrilateral in order to prove that angle 3 is congruent to angle … 
geometry
Fin the volume of a triangular prism with height 16cm, base (a right triangle with sides 7cm, 8cm, and 10cm and the right angle between shorter sides.) 
geometry
solution of the questions The sides of a quadrilateral ABCD are 6 cm, 8 cm, 12 cm and 14 cm (taken in order) respectively, and the angle between the first two sides is a right angle. Find its area. 
math
solution of the questions The sides of a quadrilateral ABCD are 6 cm, 8 cm, 12 cm and 14 cm (taken in order) respectively, and the angle between the first two sides is a right angle. Find its area. 
Geometry
A quadrilateral contains two equal sides measuring 12 cm each with an included right angle. If the measure of the third side is 8 cm and the angle opposite the right angle is 120 degrees, find the fourth side and the area of the quadrilateral. 
Math
A quadrilateral contains two equal sides measuring 12 cm each with an included right angle. If the measure of the third side is 8 cm and the angle opposite the right angle is 120 degrees, find the fourth side and the area of the quadrilateral. 
geometry
A quadrilateral has vertices A(3, 5), B(2, 0), C(7, 0), and D(8, 5). Which statement about the quadrilateral is true? 
math
Which of the following measurements, in centimeters, could be the lengths of the sides of a triangle? 
QUADRILATERAL MATHS
ABCD is a quadrilateral with angle ABC a right angle. The point D lies on the perpendicular bisector of AB. The coordinates of A and B are (7, 2) and (2, 5) respectively. The equation of line AD is y = 4x − 26. find the area of quadrilateral …