Today’s NYT Connections puzzle is a tough one. You may need to think back to your high-school math days. Read on for hints and today’s Connections answers.

Hints for today’s Connections groups

Here are four hints for the groupings in today’s Connections puzzle, ranked from the easiest yellow group to the tough (and sometimes bizarre) purple group.

Yellow group hint: Round in three dimensions.

Green group hint: Don’t worry.

Blue group hint: LAX or JFK.

Purple group hint: High-school math.

Answers for today’s Connections groups

Yellow group: Spherical things.

Green group: In an anxious state.

Blue group: Parts of an airport.

Purple group: Ending in geometry terms.

What are today’s Connections answers?

The yellow words in today’s Connections

The theme is spherical things.

The four answers are baseball, globe, marble and orange.

The green words in today’s Connections

The theme is in an anxious state.

The four answers are excited, febrile, frenetic and intense.

The blue words in today’s Connections

The theme is parts of an airport.

The four answers are apron, hangar, runway and terminal.

The purple words in today’s Connections

The theme is ending in geometry terms.

The four answers are appoint (point), deplane (plane), feline (line) and jangle (angle).

CNET editor Gael Fashingbauer Cooper, a journalist and pop-culture junkie, is co-author of “Whatever Happened to Pudding Pops? The Lost Toys, Tastes and Trends of the ’70s and ’80s,” as well as “The Totally Sweet ’90s.” She’s been a journalist since 1989, working at Mpls.St.Paul Magazine, Twin Cities Sidewalk, the Minneapolis Star Tribune, and NBC News Digital. She’s Gen X in birthdate, word and deed. If Marathon candy bars ever come back, she’ll be first in line.

See full bio