Answer:
feet
Step-by-step explanation: Since it's an isosceles triangle, we can split it into two right triangles. Now we have two right triangles with a hypotenuse of 4 and one side length of 3. To solve for the other side length (the height), we can use the Pythagorean theorem.
where h is the height of the dog house. Solving for h, we get the answer of
feet