The base of a square measures 7 cm, and its height measures 6 centimeters. How tall is your area?
1 answer:
Answer:
Step-by-step explanation:
In order to find the area of a square you take the base and multiply it by the height.
Base x Height = Area
In this case you have 7cm as the base and 6cm as the height.
All you have to do after that is multiply the two together.
Make sure that you remember to put the unit (cm) and make sure that it is because some teachers are uptight about that stuff.
Hope this helped!
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Answer:
C
Step-by-step explanation:
Calculate AC using Pythagoras' identity in ΔABC
AC² = 20² - 12² = 400 - 144 = 256, hence
AC = = 16
Now find AD² from ΔACD and ΔABD
ΔACD → AD² = 16² - (20 - x)² = 256 - 400 + 40x - x²
ΔABD → AD² = 12² - x² = 144 - x²
Equate both equations for AD², hence
256 - 400 + 40x - x² = 144 - x²
-144 + 40x - x² = 144 - x² ( add x² to both sides )
- 144 + 40x = 144 ( add 144 to both sides )
40x = 288 ( divide both sides by 40 )
x = 7.2 → C