No, two sides the same is not enough.
You need more proof.
Side, angle, side. (SAS).
AD = DC
Angle ADB = Angle CDB
BD = BD
By the SAS property, the two triangles are the same.
I think this is one way to prove it...
Or, similarly...use ASA, (Angle, side, angle).
Answer:
She needs 301.8 in² of tissue paper.
Step-by-step explanation:
In order to calculate the amount of tissue paper she needs to make 21 hats, we need to find the area of each hat and multiply it by the total number of hats she wants to make.
Since the Vietnamese conical hats are hollow and don't have a base, we need to find the area of the it's lateral walls, this is given by the following expression:
lateral area = pi*r*l
r = d/2 = 16/2 = 8 in
We were given the height, but we need the slant height, therefore:
l = sqrt(r² + h²) = sqrt(8² + 9²) = sqrt(64 + 81) = sqrt(145) = 12.041 in
Then the lateral area is:
lateral area = pi*8*12.0141 = 301.8 in²
She needs 301.8 in² of tissue paper.
Answer:
acute right acute obtuse obtuse acute
Step-by-step explanation: