Answer:
S
Step-by-step explanation:
The vertex is S. The angle can only be measured from point S.
450
If the perimeter is 90 inches then each side must equal 30 inches. To find the area of a triangle you mulptiply the base by the height and divide by 2. The base is 30 and the height is 30. 30*30=900. 900/2=450.
1/10 because there are 10 cards and only one 7
