Pls answer question no. 16 and 19 fast..I have my exam tomorrow

Pls answer question no. 16 and 19 fast..I have my exam tomorrow distance formula the povnts A(3, I), B(6. 4) and are IS whether the (6, 4) and (7. —2' are the vertices of an mangle Name the type Of mangle tormed bv the points At-S. —2) and (7. 5). and C ) form an Show that the points A (l. I), B IS Show that the points (7. JO), (-2. 5) and -4) are the of an triangle 19 The points A (O, 3). B (—2, a) and C 4) are the vertices of a right at A, find the value of a. verti' Show that the points (O, (—2, 3). (6, 7) and (8. 3), taken in order, ot a rectangle. Also tind Its area IC—SE Mathemaocs —