Answer:
The Option is D) ΔDEC ≅ ΔDEA
ΔDEC ≅ ΔDEA ….{By Side-Angle-Side Congruence Statement}
Step-by-step explanation:
Given:
AE ≅ EC
∠AED ≅ ∠CED = 90°
To Prove:
ΔDEC ≅ ΔDEA
Proof:
In ΔDEC and ΔDEA
AE ≅ EC ……….{Given}
∠AED ≅ ∠CED …………..{measure of each angle is 90°}
ED ≅ ED ……….{Reflexive Property}
ΔDEC ≅ ΔDEA ….{By Side-Angle-Side Congruence Statement}
Multiplication goes first 0.8x1.5=1.2
4+1.2-3= 2.2
Answer:
60 + 12 = 72
Step-by-step explanation:
5x + x = 72
=> 6x = 72
=> x = 72 ÷ 6
=> x =12
∴ 5×12+12=72
=> 60 + 12 = 72
Answer:
Step-by-step explanation:
First, you need to make these conversions:
(Remember that )
4,000 cm to m:
700 cm to m:
You can observe in the figure that it is formed by two rectangles and a semi-circle.
To calculate the perimeter, you need to add the exterior measures of each figure.
Remember that the circumference of a circle is:
Where "r" is the radius
Therefore, the perimeter is:
To find the area of the indoor sports exhibition, you need to add the areas of the rectangles and the area of the semi-circle.
The area of a rectangle can be calculated with:
Where "l" is the lenght and "w" is the width.
The area of a semi-circle can be calculated with:
Where "r" is the radius.
Then, the area of the indoor sports exhibition is: