Since the areas are the same (5 x 6 = 30 units), and the height of the triangle (DC) is 5 so the length of the triangle must be 12. (1/2 of 5 x 12 is also 30)

So now we use the Pythagorean theorem

a² + b² = c² we have 5² + 12² = c² or 25 + 144 = c² or 169 = c²

The square root of 169 is 13 so side DE is 13 units.

6 0

4 years ago

Which expression gives the closest estimate of 228 – 179?

Oxana [17]

Answer:

show the picture

Step-by-step explanation:

7 0

3 years ago

The diagonals of a Rhombus are 2Dm and 3M. What’s is the area of the Rhombus??

NemiM [27]

Answer:

336 $m^{2}$

Step-by-step explanation:

Area of Rhombus = (1/2)*xy

Where x and y are length of diagonals

Area = (1/2) * 21 * 32 = 21* 16 = 336

Area = 336 m²

7 0

4 years ago

Lisa says 12 3 = 9 Kay says 12 3 = 4 Who is correct? Why?

stellarik [79]

Kay is correct because if you take 3 4s and add them all together you get 12 and if you take 4 3s and add them together you get 12

8 0

4 years ago