- Right angle triangle is a triangle with one of its angle exactly equal to 90Â°. - As shown in the picture. - Obtuse angle triangle is a triangle with one of its angle greater than (>) 90Â°. - As shown in the picture. - Acute angle triangle is a triangle with all three angle less than (<) 90Â°.
Willy T. Ribbs never pondered a racing comeback until friend Chris Miles tossed the idea out there awhile back, and the rest is history. 1  2000 handoutWilly T. Ribbs, now 56 years old, is returning to racing after being out of the sport for 10 years.
By Gary Graves, USA TODAY Willy T. Ribbs, the first African-American driver in the Indy 500 in 1991, signs autographs Sunday, one of several events he's involved in for the 100th anniversary race. By Gary Graves, USA TODAY. Willy T. Ribbs, the first African-American driver in the Indy 500 in 1991, signs autographs Sunday, one of several events he's involved in for the 100th anniversary race. And just as he did in becoming the race's first African-American driver in 1991, he's beginning at the grassroots level.